方法文章

Casting Protocols for the Production of Open Cell Aluminum Foams by the Replication Technique and the Effect on Porosity

DOI：

10.3791/52268

⸱

2014年12月11日

 ,  ,  , 
1Department of Materials Science and Engineering, The University of Sheffield, 2Department of Mechanical Engineering, The University of Sheffield

本文内容

勘误通知

Important: There has been an erratum issued for this article. View Erratum Notice

摘要

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Replication 是用于生产多孔金属海绵的加工技术之一。在本文中，详细介绍了生产开孔多孔铝的方法的一种实现。

摘要

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Metal foams are interesting materials from both a fundamental understanding and practical applications point of view. Uses have been proposed, and in many cases validated experimentally, for light weight or impact energy absorbing structures, as high surface area heat exchangers or electrodes, as implants to the body, and many more. Although great progress has been made in understanding their structure-properties relationships, the large number of different processing techniques, each producing material with different characteristics and structure, means that understanding of the individual effects of all aspects of structure is not complete. The replication process, where molten metal is infiltrated between grains of a removable preform material, allows a markedly high degree of control and has been used to good effect to elucidate some of these relationships. Nevertheless, the process has many steps that are dependent on individual “know-how”, and this paper aims to provide a detailed description of all stages of one embodiment of this processing method, using materials and equipment that would be relatively easy to set up in a research environment. The goal of this protocol and its variants is to produce metal foams in an effective and simple way, giving the possibility to tailor the outcome of the samples by modifying certain steps within the process. By following this, open cell aluminum foams with pore sizes of 1–2.36 mm diameter and 61% to 77% porosity can be obtained.

引言

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Metal foams have attracted a large amount of interest and research effort in recent years as shown by the large body of work cited in wide ranging review articles such as Banhart1, Conde et al.2 or more recently Goodall and Mortensen3. Among the methods used for production of the material, the replication process is distinguished by its experimental simplicity and the degree of control over the final foam structure that can be offered. It should be noted that although in the literature such materials are often described as foams (and are here) as they are not produced by bubbles of gas within a liquid they are more appropriately called porous metals or microcellular metals.

The first report of the replication process was in the early 1960s4, and it has been developed further at different stages since then, with notable advances by the research group of Mortensen at the Ecole Polytechnique Federale de Lausanne in Switzerland.

The process relies on the casting of the metal around a preform of particles that defines the shape of the porosity in the final material2, 5. After cooling the preform can be removed by solvent leaching or pyrolysis that causes oxidation. A popular use of this technique utilizes NaCl as a space holder to produce aluminum5-10 or aluminum alloy foams11-14. NaCl has several advantages such as being readily accessible, non-toxic and can be removed from the foam by dissolution in water. By having a melting point of 801 °C, it can be used with metals that have a melting point lower than this value, most commonly aluminum, but examples also exist of the use with materials such as bulk metallic glasses, by humidifying a mix of liquid palladium-based bulk metallic glass alloy and NaCl granules15. Substitution of the NaCl with higher melting point materials also permits the production of foams from higher melting point metals16. This may include other water-soluble materials, or insoluble ones including different types of sand. In this form the process becomes more like conventional sand casting as to remove the sand, high pressure water jets17, 18 or different forms of washing19 or agitating20 are required.

The essential process21 proceeds by taking grains of NaCl and placing them in a mold4, 22, 23. The basic method has been used to make aluminum and aluminum alloy foams24-26 for a wide range of foam behavior investigations. Additional steps have been introduced to further control the density and to increase the interconnectivity of the pores; these include the densification of the preform. To densify the preform, sintering has been employed27, 28 and has been used in different experiments since13, with the sintering behavior of NaCl based on temperature, granule size and density described by Goodall et al.29. Another method used for this purpose is cold isostatic pressing (CIP)5, 30; this is a faster technique that can achieve a larger spectrum of comparable densities. The procedure can also be performed in the solid state with metal powder and NaCl grains, and is then sometimes called the Sintering and Dissolution Process31.

A full survey of the use of the replication technique to date and comparison with other techniques is given in Goodall and Mortensen3.

In this work we report in detail equipment and experimental protocols that have been used for the processing of metal foams by the replication method, and which are relatively easy to implement in a research laboratory setting. It is important to acknowledge that other versions of the equipment, with different capabilities exist in other research groups, and that while the equipment presented here is suitable to process the material, it is not the only version or protocol that can be made to work. In any case, a thorough understanding of any particular method is essential for experimental success.

The precise protocols used are detailed below. The protocol variations (A, B, C and D) have small changes between them, principally intended to alter the density of the foams produced. The porosity has been calculated from measurements of the bulk weight of the samples, their volume and the density of aluminum (2.7 g/cm3). In developing the methods described for aluminum foam production by replication, attempts have been made to reduce the amount of advanced equipment to the smallest possible extent, such that the method is as easy to implement as possible. Other variations that may be used at different stages are discussed later.

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方案

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NOTE: The instructions below are for Protocol A (Figure 1). Modifications for Protocol B, C, and D are listed as well.

1. Aluminum Bar Preparation

  1. Place a large piece (500 g – 1 kg) of commercial purity aluminum ingot into a crucible.
  2. Place the crucible in a furnace at 800 °C for about 1 hr, until molten.
  3. Take the crucible out of the furnace and pour the molten aluminum into a cylindrical mold that is 50 mm in diameter, slightly smaller than the final diameter of the chamber to be used for infiltration (51 mm) giving a gap of about ½ mm.
  4. Wait 1 hr for the bar to cool down.
  5. Remove the bar from the mold.
  6. Using a band saw, cut it into 4 same-size pieces.
  7. Sand the edges of each piece to ensure a good fit in the infiltration mold.

2. Furnace Preparation

  1. Program the furnace to reach a 740 °C plateau for at least 2 hr.
  2. Set the heating rate of the furnace to 20 °C/min.

3. Preform Preparation

NOTE: Depending on the height of the foam aimed for, vary the amount of NaCl to use for infiltration between 100 g and 300 g.

  1. Choose the infiltration NaCl to use, with a diameter corresponding to the pore size range required (for example a range between 1.4 mm and 1.7 mm). The material can be obtained from chemical suppliers in high purity, or supermarket bought table salt can be used (such material will have additives such as iodine and anti-caking agents, but these do not in practice influence the process to a significant extent).
  2. Select sieves of an appropriate size range and stack on a base container with the smaller opening size at the bottom.
  3. From the suppliers’ bag of NaCl, take approximately 500 g and pour it in the stacked sieves.
  4. Agitate the sieves, either manually or using a sieve shaker, for 1 min.
  5. Discard the NaCl left in the larger aperture size sieve and the bottom container, the NaCl left in the smaller aperture sieve is used for infiltration.
  6. Weigh the amount of infiltration NaCl obtained.
  7. If the amount is insufficient, repeat steps 3.4 to 3.7.
    NOTE: For Protocols B, C or D, obtain 100 g of fine NaCl (< 500 µm). This creates an extra space in the mold for air trapped in the preform during infiltration in case the air in the preform does not escape the chamber adequately.

4. Mold Preparation

  1. Using sandpaper and laboratory paper roll, clean the mold cylinder (Figure 2), taking special consideration for both the top and bottom edges, and keeping the mold free of any noticeable impurities from previous use.
  2. Spray the inside of the mold cylinder with boron nitride aerosol spray, creating a thin coat covering the inside of the mold.
    NOTE: This is achieved when the original color of the mold is replaced by a white layer of the spray; it is not necessary to measure its specific concentration.
  3. Let the mold cylinder dry for at least 5 min at RT (heating to around 100 °C for up to 1 hr may be applied for further drying if desired).
  4. Using fine sandpaper, remove any residue of boron nitride from the edges of the mold cylinder, to improve the seal between the mold cylinder and the mold base.
    NOTE: The next 3 steps are for Protocols A and B; for Protocols C and D cut only one gasket ring for the lid.
  5. Cut 2 gasket rings from 1 mm thick graphite sheet (OD = 60 mm, ID = 51 mm), one for the union between the top edge of the mold cylinder and the mold lid leading up to the valve system, the other for the union between the bottom edge of the mold cylinder and the mold base.
  6. Place one of the gaskets in the mold base groove.
  7. Place the bottom of the mold cylinder into the groove with the gasket.
  8. Tap lightly with a mallet on the top of the mold cylinder to secure the bottom to the base groove.
    NOTE: For Protocol B, C, or D, add the following step.
    1. Pour the 100 g of fine NaCl (< 500 µm) into the mold cylinder and flatten the top with an uncut aluminum bar tapping the top of it lightly with the mallet to ensure the fine NaCl is packed to a high density.
      NOTE: For Protocol D add the following step.
    2. Cut 2 circles of soft 2 mm thick ceramic Kaowool blanket the size of the mold diameter (51 mm) and place them on top of the fine NaCl, use the uncut aluminum bar and the mallet to press them against the fine NaCl.
  9. Pour the NaCl to be infiltrated into the mold cylinder.
    NOTE: For Protocol D add the following step.
    1. Attach the mold and base to a vibrating table, making sure the mold cylinder does not move from the base groove. Vibrate for 1 min at 50 Hz with a 0.01 m amplitude.
  10. Holding the top of the cylinder in place, pick up the base and shake lightly until the NaCl inside the mold forms a flat surface at the top.
  11. Place the prepared aluminum bar on top of the NaCl preform.
  12. Place a graphite gasket in the groove of the mold lid.
  13. By hand screw the 4 stainless steel studs to the base and secure them with 4 sets of stainless steel nuts and washers on the top of the base using a wrench and place the mold lid on top of the mold cylinder through the studs.
  14. With a torque wrench set at 16 N·m, screw the 4 sets of steel nuts and washers on the 4 threaded rods screwed into the base and extending up through the lid, where the nuts are tightened to lock the mold lid in place.
  15. Attach the top of the lid to the valve system with the gasket, clamp, bolt and butterfly nut.
  16. Close all the valves of the system.
  17. Open the valve leading to the vacuum pump and the mold (valve 3).
  18. Turn on the vacuum pump until the dial gauge of the valve system indicates the lowest pressure possible.
  19. Turn off the vacuum pump.
  20. If the loss of vacuum in the system is lower than a rate of 50 Torr/sec for the first 10 sec after shutting down the vacuum pump the seal is sufficiently good for infiltration.
  21. Leave the lid valve open (valve 3) to keep the system at ambient pressure and close the vacuum pump valve (valve 1).
  22. Without detaching the valve system, place the mold in the preheated furnace and wait for 1 hr.

5. Infiltration

  1. Close all the valves of the system (Figure 3).
  2. Open the valve leading to the argon gas cylinder (valve 2).
  3. Open the main valve on the argon gas tank and set the infiltration pressure with the regulator valve (for a range of 1.4 mm to 1.7 mm of NaCl particle size, use a pressure of 3.5 bars).
    NOTE: For Protocol B, an infiltration pressure of 3 bar is used. Use a pressure of 1 bar for Protocols C and D.
  4. In a swift manner, open the lid valve (valve 3).
  5. After 1 min, remove the mold from the furnace and place it on top of a cooling surface (in this case a copper block).
    NOTE: While cooling, the pressure in the system will change. For the first 5 min of this process, pay close attention to the pressure indicated by the regulator and adjust back to the infiltration pressure if necessary.

6. Sample Extraction

  1. After 30 min, when the mold is cool enough to handle with light heat resistant gloves, detach the valve system and place the mold base on a workbench vise. Unscrew the lid from the top of the cylinder.
  2. With the lid off, lightly tap the top of the mold cylinder with a mallet in a perpendicular direction to the vise’s grip to loosen the mold cylinder from the base groove.
  3. Remove the mold base from the vise and place the mold cylinder in the vise grip.
  4. With the mallet tap the remaining aluminum on top of the sample to push it out of the mold cylinder.
  5. Using a band saw, cut the bottom part of the foam sample, removing the surplus aluminum.
  6. Depending on the height of foam required, cut where desired, close to the top of the sample.
  7. Place the infiltrated foam in a beaker with water and a magnetic stirring bar on a stirring hot plate to dissolve the NaCl preform.
  8. Set the temperature of the hot plate to 60 °C. Change the water every 10 min until there is no NaCl left in the foam.
    NOTE: To ensure there is no NaCl left in the foam, change the water approximately 10 times. It is also possible to make periodic checks of the sample weight after a brief drying stage. When this ceases to change significantly with further immersion, the NaCl must be completely removed.
  9. Finally using an electric air drier remove all the water left in the foam. The foam sample is ready.

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结果

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In Figure 4 the morphology of the NaCl grains can be seen (angular and spherical), for illustrative purposes. The foams obtained with Protocol A were made using angular shaped grains and the rest were made with the spherical grains. It was found that the use of different shape NaCl grains had no observed effect on the porosity obtained in the samples.

From the results we can determine that samples a, b, and c (made with Protocol A), are on average 63% porous (Figure 5<...

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讨论

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The basic method described here has been used in different forms by other researchers. Some of the key variants that allow foams of different types to be created are discussed. In characterizing these foams we have measured the porosity, as this is a quick and easy assessment to make, but characterization of other structural characteristics, such as pore size, specific surface area or strut thickness might be required to obtain a full understanding of foam characteristics for different applications. In practice, for prod...

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披露

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提交人声明，他们没有竞争的经济利益。

致谢

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The corresponding author would like to acknowledge the Mexican Government’s National Council of Science and Technology CONACYT for provision of a scholarship.

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材料

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http://www.wickes.co.uk/Specialist-Wet+Dry-Sandpaper-PK4/p/501885 筛Fisher ScientificFisherbrand 测试筛 200 毫米diamaterhttp://www.fisher.co.uk/product/brand_listing.php/F/Fisherbrand/Sieve
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参考文献

$$\rightleftharpoonup{xx}$$ $$\longleftharp{xx}$$, $$\longrightharp{xx}$$,
  1. Banhart, J. Manufacture, characterisation and application of cellular metals and metal foams. Progress in Materials Science. 46, 559-632 (2000).
  2. Conde, Y., Despois, J. -F., Goodall, R., Marmottant, A., Salvo, L., San Marchi, C., Mortensen, A. Replication processing of highly porous materials. Advanced Engineering Materials. 8 (9), 795-803 (2006).
  3. Goodall, R., Mortensen, A. Chapter 24. Porous Metals. Physical Metallurgy. Laughlin, D. E., Hono, K. , 5th Ed, 2399-2595 (2014).
  4. Polonsky, L., Lipson, S., Markus, H. Lightweight Cellular Metal. Modern Castings. 39, 57-71 (1961).
  5. San Marchi, C., Mortensen, A. Chapter 2.06. Infiltration and the Replication Process for Producing Metal Sponges. Handbook of Cellular Metals. Degischer, H. P., Kriszt, B. , Wiley-VCH. 44-56 (2002).
  6. Galliard, C., Despois, J. F., Mortensen, A. Processing of NaCl powders of controlled size and shape for the microstructural tailoring of aluminium foams. Materials Science and Engineering A. 374 (1-2), 250-262 (2004).
  7. Despois, J. F., Mortensen, A. Permeability of open-pore microcellular materials. Acta Materialia. 53 (5), 1381-1388 (2005).
  8. Goodall, R., Despois, J. F., Marmottant, A., Salvo, L., Mortensen, A. The effect of preform processing on replicated aluminium foam structure and mechanical properties. Scripta Materialia. 54, 2069-2073 (2006).
  9. Goodall, R., Marmottant, A., Salvo, L., Mortensen, A. Spherical pore replicated microcellular aluminium: Processing and influence on properties. Materials Science and Engineering A. 465 (1-2), 124-135 (2007).
  10. Despois, J. F., Marmottant, A., Salvo, L., Mortensen, A. Influence of the infiltration pressure on the structure and properties of replicated aluminium foams. Materials Science and Engineering A. 462, 68-75 (2007).
  11. San Marchi,, Despois, C., F, J., Mortensen, A. Uniaxial deformation of open-cell aluminium foam: the role of internal damage. Acta Materialia. 52 (10), 2895-2902 (2004).
  12. Goodall, R., Weber, L., Mortensen, A. The electrical conductivity of microcellular metals. Journal of Applied Physics. 100, 044912(2006).
  13. Kadar, C., Chmelik, F., Kendvai, J., Voros, G., Rajkovits, Z. Acoustic emission of metal foams during tension. Materials Science and Engineering A. 462, 316-319 (2007).
  14. Goodall, R., Mortensen, A. Microcellular aluminium. Child’s Play! Advanced Engineering Materials. 9 (11), 951-954 (2007).
  15. Wada, T., Inoue, A. Fabrication, Thermal Stability and Mechanical Properties of Porous Bulk Glassy Pd-Cu-Ni-P Alloy. Materials Transactions. 44 (10), 2228-2231 (2003).
  16. DeFouw, J. D., Dunand, D. C. Processing and compressive creep of cast replicated IN792 Ni-base superalloy foams. Materials Science & Engineering A. 558, 129-133 (2012).
  17. Berchem, K., Mohr, U., Bleck, W. Controlling the Degree of Pore Opening of Metal Sponges, Prepared by the Infiltration Preparation Method. Materials Science and Engineering A. 323 (1-2), 52-57 (2002).
  18. Lu, T. J., Ong, J. M. Characterization of closed-celled cellular aluminum alloys. J. Mater. Sci. 36, 2773-2786 (2001).
  19. Chou, K. S., Song, M. A. A Novel Method for Making Open-cell Aluminum Foams with Soft Ceramic Balls. Scripta Materialia. 46 (5), 379-382 (2002).
  20. Dairon, J., Gaillard, Y., Tissier, J. C., Balloy, D., Degallaix, G. Parts Containing Open-Celled Metal Foam Manufactured by the Foundry Route: Processes, Performances and Applications. Advanced Engineering Materials. 13 (11), 1066-1071 (2011).
  21. LeMay, J. D., Hopper, R. W., Hrubesh, L. W., Pekala, R. W. Low-Density Microcellular Materials. Materials Research Society Bulletin. 15 (12), 19-20 (1990).
  22. Seliger, H., Deuther, U. Die Herstellung von Schaum- und Zellaluminium. Feiburger Forschungshefte. , 103-129 (1965).
  23. Kuchek, H. A. Method of Making Porous Metallic Article. US patent. , 3,236,706 (1966).
  24. Han, F., Cheng, H., Wang, J., Wang, Q. Effect of pore combination on the mechanical properties of an open cell aluminum foam. Scripta Materialia. 50 (1), 13-17 (2004).
  25. Cao, X. -q, Wang, Z. -h, Ma, H. -w, Zhao, L. -m, Yang, G. -t Effects of cell size on compressive properties of aluminum foam. Transactions of Nonferrous Metals Society of China. 16, 351-356 (2006).
  26. Abdulla, T., Yerokhin, A., Goodall, R. Effect of plasma electrolytic oxidation coating on the specific strength of open-cell aluminium foams. Materials & Design. 32, 3742-3749 (2011).
  27. San Marchi, C., Mortensen, A. Fabrication and Comprehensive Response of Open-cell Aluminum Foams with Sub-millimeter Pores. Euromat99. Clyne, T. W., Simancik, F. 5, DGM/Wiley-VCH. Munich, Germany. 34(1999).
  28. San Marchi, C., Mortensen, A. Deformation of open-cell aluminium foam. Acta Materialia. 49 (19), 3959-3969 (2001).
  29. Goodall, R., Despois, J. F., Mortensen, A. Sintering of NaCl powder: Mechanisms and first stage kinetics. Journal of the European Ceramic Society. 26 (16), 3487-3497 (2006).
  30. Despois, J. F., Conde, Y., San Marchi, C., Mortensen, A. Tensile Behaviour of Replicated Aluminium Foams. Advanced Engineering Materials. 6 (6), 444-447 (2004).
  31. Zhao, Y. Y. Stochastic Modelling of Removability of NaCl in Sintering and Dissolution Process to Produce Al Foams. Journal of Porous Materials. 10 (2), 105-111 (2003).

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勘误

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Formal Correction: Erratum: Casting Protocols for the Production of Open Cell Aluminum Foams by the Replication Technique and the Effect on Porosity
Posted by JoVE Editors on 8/03/2015. Citeable Link.

A journal reference was corrected in the publication of Casting Protocols for the Production of Open Cell Aluminum Foams by the Replication Technique and the Effect on Porosity. Reference 21 and 22 were originally merged together as one reference. They have been separated into references 21 and 22 in the article. The reference numbers have been updated in the article to reflect this additional reference citation. It has been updated from:

  1. LeMay, J.D., Hopper, R.W., Hrubesh, L.W., & Pekala, R.W. Low-Density Microcellular Materials. Materials Research Society Bulletin. 15 (12), 19–20 (1990).Seliger, H., & Deuther U. Die Herstellung von Schaum- und Zellaluminium. Feiburger Forschungshefte. 103–129 (1965).

to:

  1. LeMay, J.D., Hopper, R.W., Hrubesh, L.W., & Pekala, R.W. Low-Density Microcellular Materials. Materials Research Society Bulletin. 15 (12), 19–20 (1990).
  2. Seliger, H., & Deuther U. Die Herstellung von Schaum- und Zellaluminium. Feiburger Forschungshefte. 103–129 (1965).

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