%0 Journal Article
%T In-situ Reaction Synthesis of Structural Ceramic Nanocomposites<br>纳米复相结构陶瓷的原位反应合成
%A ZHANG Guo-jun
%A <br>张国军
%J 过程工程学报
%D 2002
%I 
%X The principle and feasibility of in-situ reaction synthesis process for the preparation of structural ceramic nanocomposites is briefly introduced. It is considered that the in-situ reaction synthesis process is an effective method for the preparation of structural ceramic nanocomposites. Meanwhile, the features and ways for property improvement of h-BN composites are discussed. It is suggested that high performance BN composites are difficult to be produced by conversional process. In this work, a series of in-situ chemical reactions are proposed, fine and homogeneously distributed nonoxide-boron nitride (Nobn) composites were obtained by hot pressing or pressureless sintering. The in-situ formed nanosized BN flakes were distributed at the grain boundaries of the SiC matrix. A new concept of composites called Partially Weakened Interfaces Composites (PWIC) is suggested and a PWIC is obtained in this SiC-BN composite when the BN content is less than a certain value. Such PWICs demonstrate excellent comprehensive mechanical properties.
%K in-situ reaction synthesis
%K structural ceramics
%K nanocomposite
%K boron nitride
%K microstructural design<br>原位反应合成
%K 结构陶瓷
%K 纳米复合材料
%K 氮化硼
%K 显微结构设计
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=AF16F5E227EB97A7&yid=C3ACC247184A22C1&vid=0B39A22176CE99FB&iid=E158A972A605785F&sid=A7AE820C12CC9AD3&eid=663FF78B2ADE7A2D&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=1&reference_num=12