先驱体转化法制备Diamond/SiC复合材料  

Fabrication of Diamond/SiC Composites by PIP Process

作　　者：杨振亮[1] 何新波[1] 张昊明[1] 曲选辉[1] 

机构地区：[1]北京科技大学,北京100083

出　　处：《稀有金属材料与工程》2011年第S1期383-386,共4页Rare Metal Materials and Engineering

摘　　要：以聚碳硅烷(PCS)为先驱体,采用先驱体浸渍裂解工艺(PIP)制备出Diamond/SiC复合材料,重点研究制备工艺参数对复合材料致密度等性能的影响规律。结果表明:PCS裂解产生的β-SiC与基体中α-SiC和Diamond的界面相容性良好,有利于Diamond/SiC的致密化;模压压力、浸渍液浓度以及预氧化处理等制备工艺参数是影响Diamond/SiC复合材料致密度的主要原因;Diamond/SiC多孔坯经7个周期的PIP处理后可成为致密度较高的Diamond/SiC复合材料。Diamond/SiC composites were fabricated by precursor infiltration and pyrolysis process (PIP) with polycarbosilane (PCS) as a precursor. The effect of the preparation parameters on the densification of the composites was investigated. The results show that the pyrolysis product (β-SiC) exhibits better interfacial compatibility with α-SiC and Diamond in the composites, which is beneficial to the densification of Diamond/SiC composites. The preparation parameters such as compacting pressure and impregnation concentration as well as pre-oxidation treatment are the main factors influencing the density of Diamond/SiC composites. Highly dense Diamond/SiC composites can be obtained by PIP through 7 cycles from porous Diamond/SiC bodies.

关 键 词：先驱体转化法 Diamond/SiC 聚碳硅烷 

分 类 号：TB332[一般工业技术—材料科学与工程]