%0 Journal Article
%T Microstructure and Properties of Polycarbosilane Transferred Nano SiC Reinforced B4C Matrix Composites<br>由聚碳硅烷生成纳米SiC颗粒增强B4C基复相陶瓷的结构与性能
%A DING Shuo
%A WEN Guang-Wu
%A LEI Ting-Quan
%A ZHOU Yu
%A <br>丁硕
%A 温广武
%A 雷廷权
%A 周玉
%J 无机材料学报
%D 2002
%I Science Press
%X Nano-sized SiC reinforced B4C matrix composites were fabricated through a pyrolysis route from polycarbosilane(PCS) precursor. The microstructure and properties of the materials, compared with the materials sintered by direct mixed powders, were investigated. It shows that, the composites fabricated via precursor form a kind of complicated intra-intergranular structure: nano SiC within the grains of B4C and Al2O3, sharp angle-layered SiC precipitating in the grain boundaries, and SiC substructures within the grains of B4C. The crack deflection within the crystal grains is caused by intragranular fracture, increasing the fracture toughness significantly. The homogenization, relative density and mechanical properties of the composites fabricated by polycarbosilane precursor are higher than those of the composites made by directly mixed powders.
%K boron carbide
%K polycarbosilane
%K precursor
%K nano SiC<br>聚碳硅烷
%K 纳米SiC颗粒
%K 结构
%K 性能
%K 碳化硼
%K 先驱体
%K B4C基复相陶瓷
%K 硅化硅
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=78FCB771D3662201&yid=C3ACC247184A22C1&vid=BCA2697F357F2001&iid=94C357A881DFC066&sid=4D5C5090B0F83CF9&eid=5839F1C61E1C000D&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=7&reference_num=12