Grain boundary complexion engineering
WebNov 4, 2016 · Skutterudite materials are widely considered for thermoelectric waste heat recovery. While the skutterudite structure effectively scatters the high frequency phonons, grain-boundary engineering is needed to further reduce the thermal conductivity beyond simply decreasing grain size. Here, we show that reduce 2024 Energy and … WebJul 10, 2015 · Nanocrystalline Cu-3 at.% Zr powders with ~20 nm average grain size were created with mechanical alloying and their thermal stability was studied from 550-950 °C. Annealing drove Zr segregation to the grain boundaries, which led to the formation of amorphous intergranular complexions at higher temperatures. Grain growth was …
Grain boundary complexion engineering
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WebJul 1, 2024 · Grain boundaries can undergo phase-like transitions, called complexion transitions, in which their structure, composition, … Webasymmetric structural transition at Mo-Ni tilt grain boundaries [17]. Yang et al. [17] were even able to construct a grain boundary complexion (phase) diagram by finding the transition line and critical inflection point, which would require an enormous amount of time and effort if tackled experimentally.
WebGrain boundary complexion transitions can lead to rapid changes in the macroscopic properties of polycrystalline metals and ceramics and are responsible for a variety of materials phenomena as diverse as activated sintering and liquid-metal embrittlement.
WebWhile the skutterudite structure effectively scatters the high frequency phonons, grain-boundary engineering is needed to further reduce the thermal conductivity beyond simply decreasing grain size. Here, we show that reduced graphene oxide (rGO) increases the grain boundary thermal resistivity by a factor of 3 to 5 compared to grain boundaries ... WebJan 18, 2024 · Grain boundary complexion engineering is introduced in this paper as a method for controlling complexion transitions to improve material performance. This International Conference on Sintering ...
WebMar 19, 2015 · Grain boundaries are inherently an area of disorder in polycrystalline materials which define the transport and various other material properties. The relationship between the interfacial chemistry, structure and the material properties is not well understood. ... Among the various taxonomies for grain boundaries, Grain Boundary …
WebGrain boundaries exhibit phase-like behavior in which their structure, chemistry and properties may change discontinuously at critical values of thermodynamic parameters … somic mm185WebJan 29, 2024 · Grain boundaries (GBs) can be treated as two-dimensional (2-D) interfacial phases (also called “complexions”) that can undergo interfacial phase-like transitions. As bulk phase diagrams and calculation of phase diagram (CALPHAD) methods serve as a foundation for modern materials science, we propose to extend them to GBs to have … somi-cnc s.r.oWebengineering-type construction framing joints between structural members such as beams, girders, columns, bases and foundations, and truss members. Examples of these typical … small cottages for sale scotlandWebJan 16, 2024 · For example, grain boundary phase diagrams have been created to describe complexion transitions and help design new microstructures that take advantage of grain boundary engineering [16, 17]. Grain boundary pre-melting transitions have been reported in metallic systems such as Fe–Si–Zn [18, 19], Fe–Nd–B , Fe–Mn–Cu , … small cottages for sale ukWebMar 16, 2024 · Grain boundary complexion engineering is introduced in this paper as a method for controlling complexion transitions to improve material performance. This International Conference on Sintering ... somico knivesWebMay 19, 2024 · In terms of grain-boundary wetting-phase transitions, the liquid metal first occurs in the triple junctions and further penetrates into these adjacent grain … somico hiringWebMay 22, 2016 · We investigate the mechanisms of incipient plasticity at low angle twist and asymmetric tilt boundaries in fcc metals. To observe plasticity of grain boundaries independently of the bulk plasticity, we simulate nanoindentation of bicrystals. On the low angle twist boundaries, the intrinsic grain boundary (GB) dislocation network deforms … small cottages house plans