Grain Size Optimization
Grain Size Optimization - Related Videos
06:52
Nanocrystalline Alloys and Nano-grain Size Stability
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2023
Source: Sina Shahbazmohamadi and Peiman Shahbeigi-Roodposhti-Roodposhti, School of Engineering, University of Connecticut, Storrs, CT Alloys with grain size less than 100 nm are known as nanocrystaline alloys. Due to their enhanced physical and mechanical properties, there is an ever-increasing demand to employ them in various industries such as semiconductor, biosensors and aerospace. To improve the processing and application of nanocrystalline alloys, it is necessary to develop close to 100%...
09:13
Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction
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Cited by 8 •
2017
This paper provides a detailed method to characterize the microstructure of ultra-fine grained and nanocrystalline materials using a scanning electron microscope equipped with a standard electron backscatter diffraction system. Metal alloys and minerals presenting refined microstructures are analyzed using this technique, showing the diversity of its possible applications.
09:51
Atom Probe Tomography Studies on the Cu(In,Ga)Se2 Grain Boundaries
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Cited by 29 •
2013
In this work, we describe the use of the atom-probe tomography technique for studying the grain boundaries of the absorber layer in a CIGS solar cell. A novel approach to prepare the atom probe tips containing the desired grain boundary with a known structure is also presented here.
04:50
Preliminary Study on Acupuncture Combined with Grain-sized Moxibustion for Treating Rheumatoid Arthritis with Finger Joint Pain
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2025
Based on the clinical trial, this study provides a standardized operational reference for treating RA with finger joint pain through acupuncture combined with grain-sized moxibustion by stimulating acupoints and warming. It can be used as an effective complementary therapy for RA pain management due to its efficacy and advantages.
01:25
The Anchoring-and-Adjustment Heuristic
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2020
In order to make good decisions, we use our knowledge and our reasoning. Often, this knowledge and reasoning is sound and solid. However, sometimes, we are swayed by biases or by others manipulating a situation. For example, let’s say you and three friends wanted to rent a house and had a combined target budget of $1,600. The realtor shows you only very run-down houses for $1,600 and then shows you a very nice house for $2,000. Might you ask each person to pay more in rent to get the $2,000...
FAQs
Grain dimensions reflect the balance between how many crystals begin forming and how extensively those crystals grow. Processing conditions can favor greater nucleation, more growth, or a combination of both. Composition, cooling rate, sintering temperature, and processing time therefore provide practical controls for shifting the resulting grain structure and, consequently, the material’s final behavior.
Grain boundaries can impede dislocation motion, which affects how a material responds mechanically. Because dislocations are associated with deformation, changing the number and arrangement of boundaries can alter strength-related behavior. Grain Size Optimization therefore does more than adjust dimensions: it uses microstructural features to help balance mechanical performance with the stability requirements of metals and ceramics used in bioengineering.
Grain boundaries provide microstructural features that can influence diffusion and surface behavior, while also affecting how a material degrades. These effects are important when a biomaterial contacts a biological environment, because changes in transport or degradation can alter stability over time. Selecting processing conditions that produce an appropriate grain structure helps connect internal crystal architecture with chemical and biological performance.
The main controllable variables identified for this approach are composition, cooling rate, sintering temperature, and processing time. Each can change the relative contributions of nucleation and crystal growth, producing different grain dimensions. Their effects must be considered together when targeting a particular combination of mechanical, chemical, and biological properties rather than optimizing one property in isolation.
A practical workflow begins by selecting the desired mechanical, chemical, or biological outcome, then adjusting composition or processing conditions that regulate crystal formation and growth. Cooling rate, sintering temperature, and processing time serve as key controls. The resulting grain structure can then be considered in relation to strength, stability, degradation control, and behavior at biological interfaces.
Bioengineering applications include metals, ceramics, implants, coatings, and tissue-engineering scaffolds. In each case, controlling the grain structure can support a different performance goal, such as improved strength in an implant, greater stability in a coating, controlled degradation in a scaffold, or more suitable interactions between a material surface and its surrounding biological environment.
For implants and coatings, grain structure can be selected to address both structural and environmental demands. Grain boundaries influence dislocation motion, diffusion, degradation, and surface behavior, so processing can help balance mechanical strength with chemical stability. This is relevant when a material must remain functional while exposed to biological conditions and maintain an appropriate interface with surrounding tissue.
Tissue-engineering scaffolds must be considered not only for their structural properties but also for degradation and biological interactions. Grain size affects microstructural features associated with diffusion, surface behavior, and degradation. Adjusting composition and thermal processing can therefore help tailor a scaffold’s stability and its response within a biological environment, while supporting the desired mechanical performance.