%0 Journal Article
%T Mechanical Properties and Microstructure of SiC-ZrO2(3Y)-Al2O3 Nanocomposites<br>SiC-ZrO2(3Y)-Al2O3纳米复相陶瓷的力学性能和显微结构
%A GAO Lian
%A WANG Hong-Zhi
%A HONG Jin-Sheng
%A MIYAMOTO Hiroki
%A DIAZ DE LA TORRE Sebastian
%A <br>高濂
%A 王宏志
%A 洪金生
%A 宫本大树
%A ＤＩＡＺＤＥＬＡＴＯＲＲＥＳｅｂａｓｔｉａｎ
%J 无机材料学报
%D 1999
%I Science Press
%X Heterogeneous precipitation methods were used to produce 5wt% SiC-15wt% ZrO2 (3Y)-Al2O3nanocomposite powders. The aqueous suspension's pH controlled between 9 and 10, and the resulting gel calcined at 1000 are two key processes for preparing nanocomposite powders. 5wt%SiC--15 wt% Zro2(3Y)-Al2O3 nanocomposites were superfast densified using spark plasma sintering (SPS) process by heating to a sintering temperature between 1350 to 1600 at a heating rateof 600/min, without holding time, and then fast cooling to 600 within 3 minutes. Bendingstrength of 5wt% SiC-15wt% ZrO2(3Y)--Al2O3 nanocomposites sintered at 1450 reached a valueas high As 1200MPa, while the fracture toughness of the sample sintered at 1450 was aboveSMPa.m1/2, which is significantly higher than that of SiC-Al2O3 nanocomposites and Al2O3 ceramics. Microstructure studies found that nano-SiC particles were mainly located within Al2O3grains and the fracture mode of the nanocomposites was mainly transgranular fracture. It is themain reason why the intra-type nanocomposites show excellent mechanical properties, while inpresent research system, a part of contribution to high mechanical properties is from ZrO2 phasetransformation toughening.
%K SiC nanocomposites
%K spark plasma sintering
%K mechanical property<br>力学性
%K 显微结构
%K 复合陶瓷
%K 碳化硅
%K 氧化锆
%K 纳米
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=894D70E4A6F117E713092BA10AD4D989&yid=B914830F5B1D1078&vid=F3583C8E78166B9E&iid=94C357A881DFC066&sid=FC6FCA5A7559F1FB&eid=FE6645F2371CA43C&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=9&reference_num=10