Spark plasma sintering of damage tolerant and machinable YAM ceramics  

作　　者：Qian WANG Salvatore GRASSO Chunfeng HU Haibin ZHANG Shu CAI Yoshio SAKKA Qing HUANG 

机构地区：[1]Ningbo Institute of Materials Technology and Engineering(NIMTE),Chinese Academy of Sciences(CAS),Ningbo 315201,China [2]Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education,Tianjin University,Tianjin 300072,China [3]School of Engineering&Materials Science and Nanoforce Technology Ltd.,Queen Mary University of London,Mile End Road,London E14NS,UK [4]China Academy of Engineering Physics,Mianyang 621900,China [5]National Institute for Materials Science(NIMS),Tsukuba,Ibaraki 305-0047,Japan

出　　处：《Journal of Advanced Ceramics》2013年第2期193-200,共8页先进陶瓷（英文）

基　　金：The present work was supported by“Chunlei Program”in Ningbo,“Hundred Talents Program”of the Chinese Academy of Sciences(No.KJCX2-EW-H06);National Natural Science Foundation of China(No.51172248/E020301);National Natural Science Foundation of China(Nos.50772072 and 51072129).

摘　　要：Single-phase Y_(4)Al_(2)O_(9)(YAM)powders were synthesized via solid-state reaction starting from nano-sized Al_(2)O_(3) and Y_(2)O_(3).Fully dense(99.5%)bulk YAM ceramics were consolidated by spark plasma sintering(SPS)at 1800℃.We demonstrated the excellent damage tolerance and good machinability of YAM ceramics.Such properties are attributed to the easy slipping along the weakly bonded crystallographic planes,resulting in multiple energy dissipation mechanisms such as transgranular fracture,shear slipping and localized grain crushing.

关 键 词：CERAMIC synthesis microstructure property damage tolerance 

分 类 号：TB3[一般工业技术—材料科学与工程]