Competitive grain growth behavior in laminated ceramic composites: An insight from numerical simulation

2021 ◽  
Author(s):  
Qian Zhou ◽  
Bei Xue ◽  
Shengyue Gu ◽  
Zhaoning Yang
Keyword(s):  
Numerical Simulation ◽  
Grain Growth ◽  
Ceramic Composites ◽  
Growth Behavior ◽  
Grain Growth Behavior

Grain Growth Behavior and Characteristics of Multiphase Ceramic Composites Fabricated by Organic-Inorganic Solution Technique

2007 ◽  
Vol 558-559 ◽  
pp. 1249-1253
Author(s):  
Sang Jin Lee
Keyword(s):  
Polyethylene Glycol ◽  
Flexural Strength ◽  
Grain Growth ◽  
Sintering Temperature ◽  
Ceramic Composites ◽  
Milling Process ◽  
Growth Behavior ◽  
Solution Technique ◽  
Polymeric Carrier ◽  
Grain Growth Behavior

Multi-component ceramic composites consisting of two, three and four phases, based on duplex microstructures of zirconia and alumina, were fabricated by a polymer complexation route employing polyethylene glycol (PEG) as a polymeric carrier. The polymer complexation route provided porous and soft powders and they were sintered after a simple ball milling process. In this study, the microstructures and flexural strengths of the multi-component (Al2O3-ZrO2-Y2O3-SrO) ceramic composites were examined on the processing variations of mole ratio and sintering temperature. The composites showed various grain morphologies according to the sintering temperature, and flexural strength of 410 MPa was obtained in the Al2O3·ZrO2·0.5Y2O3·0.4SrO composite sintered at 1600 °C for 1 h. In particular, needle-shape grains were observed in the four-component composites sintered at 1500 °C.

scholarly journals Effect of Cold-Deformation on Austenite Grain Growth Behavior in Solution-Treated Low Alloy Steel

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1004 ◽  
Author(s):  
Xianguang Zhang ◽  
Kiyotaka Matsuura ◽  
Munekazu Ohno
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Grain Growth ◽  
Cold Deformation ◽  
Growth Behavior ◽  
Low Alloy Steel ◽  
Solution Treated ◽  
Austenite Grain ◽  
Grain Growth Behavior ◽  
Austenite Grain Growth

The occurrence of abnormal grain growth (AGG) of austenite during annealing is a serious problem in steels with carbide and/or nitride particles, which should be avoided from a viewpoint of mechanical properties. The effects of cold deformation prior to annealing on the occurrence of AGG have been investigated. It was found that the temperature range of the occurrence of AGG is shifted toward a low temperature region by cold deformation, and that the shift increases with the increase of the reduction ratio. The lowered AGG occurrence temperature is attributed to the fine and near-equilibrium AlN particles that are precipitated in the cold-deformed steel, which is readily dissolved during annealing. In contrast, coarse and non-equilibrium AlN particles precipitated in the undeformed steel, which is resistant to dissolution during annealing.

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