%0 Journal Article
%T MICROSTRUCTURE AND FRACTURE FEATURE OF ZTA-SiC_W COMPOSITE
%A ZHANG Jinsong XIA Fei LUO Chuan CAO Lihua ZHAO Kuanfang HU Wanping Institute of Metal Research
%A Academia Sinica
%A Shenyang
%A China ZHANG Jinsong Research Assistant
%A <br>ZHANG Jinsong XIA Fei LUO Chuan CAO Lihua ZHAO Kuanfang HU Wanping Institute of Metal Research
%A Academia Sinica
%A Shenyang
%A China ZHANG Jinsong Research Assistant
%A Institute of Metal Research
%A Academia Sinica
%A Shenyang
%A China
%J 金属学报(英文版)
%D 1990
%I 
%X A ZTA-SiC_W ceramic composite of room temperature strength 935—1110 MPa and frac-ture toughness 9.7MPa·m~(1/2) was prepared using the sol-gel proeess.Its microstructure andfracture feature have been examined by means of X-ray diffraction analysis and electron mi-croscope observations.The results show that the whiskers are well dispersed and the matrixhas an obvious texture character.Between the whisker and matrix,there is a great number oftranscrystalline and transcrystalline connective relation other than part of conventionalpolycrystalline connective ones.Certain secondary cracks closely related with local whiskergroup are found on the fracture surface.It may be a new reinforcing and toughening mecha-nism by whisker group,of which the whiskers in the local whisker group arrest synergeticallythe crack propagation accompaning with the formation of secondary cracks.
%K ceramic composite
%K microstructure
%K fracture<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=8BE77C9036B525E8A47F088E40C5C698&yid=8D39DA2CB9F38FD0&vid=38B194292C032A66&iid=9CF7A0430CBB2DFD&sid=1E41DF9426604740&eid=9F6DA927E843CD50&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=8