Oscillatory pressure-assisted sinter forging for preparation of high-performance SiC whisker reinforced Al_(2)O_(3) composites  

作　　者：Hongtian HE Gang SHAO Rui ZHAO Hongyi TIAN Hailong WANG Bingbing FAN Hongxia LU Hongliang XU Rui ZHANG Li-nan AN 

机构地区：[1]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China [2]School of Materials Science and Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China [3]School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523808,China

出　　处：《Journal of Advanced Ceramics》2023年第2期321-328,共8页先进陶瓷（英文）

基　　金：support from the National Natural Science Foundation of China (Grant Nos.52072344 and U1904180);Excellent Young Scientists Fund of Henan Province (Grant No.202300410369);Henan Province University Innovation Talents Support Program (Grant No.21HASTIT001).

摘　　要：In this work,a novel process,oscillatory pressure-assisted sinter forging(OPSF),for the preparation of high-performance ceramic composites was reported.Compared with the samples made by conventional sinter forging(SF)and hot oscillatory pressing(HOP),the SiC whisker reinforced Al_(2)O_(3) composites(SiCw–Al_(2)O_(3))prepared by OPSF at the same temperature exhibited a higher density and significantly improved the mechanical properties.The improvements in densification and performance are attributed to simultaneous enhanced shear deformation at both macro-and micro-scales,resulting from the combination of die-free configuration and oscillatory pressure of OPSF.And the strength of grain boundary is greatly increased when the temperature reaches 1600℃ of OPSF,due to that the grain-boundary sliding became pronounced at higher temperatures.The current results shed light on a powerful technique for preparing ceramic composites,which is likely applicable to other systems.

关 键 词：sintering oscillatory pressure-assisted sinter forging(OPSF) DENSIFICATION mechanical property ceramic composites 

分 类 号：TB332[一般工业技术—材料科学与工程]