反应烧结碳化硼/碳化硅坯体和烧结体的性能测试及分析  

Reaction Sintering of Boron Carbide/silicon Carbide Green Body and Sintered Body Performance Test and Analysis

作　　者：尹茜[1] 张玉军[2] 于庆华[1] 

机构地区：[1]山东城市建设职业学院建工系,济南250103 [2]山东大学材料科学与工程学院,济南250014

出　　处：《硅酸盐通报》2013年第6期1196-1200,共5页Bulletin of the Chinese Ceramic Society

基　　金：山东省高等学校科技计划项目(J10LD59)

摘　　要：以聚乙烯吡咯烷酮作碳化硼和炭黑分散剂;四甲基氢氧化铵作碳化硅分散剂,分别以丙烯酰胺、N,N'‐亚甲基双丙烯酰胺为单体和交联剂,采用凝胶注模工艺制备碳化硼/碳化硅坯体,再经过高温烧结,制备碳化硼/碳化硅烧结体试样。通过对凝胶注模成型反应烧结碳化硼/碳化硅坯体及烧结试样的性能研究表明:坯体的弯曲强度随着固含量的增加而增大,当固含量为55vol%时强度达到24.3 MPa。烧结体的断裂韧性随碳化硼含量的增加先提高后降低。最佳碳化硼含量为10wt%,此时断裂韧性可达到最大值5.07 MPa.m1/2。烧结体的硬度随着碳化硼含量的增加而增加,当碳化硼含量达20wt%时,硬度达到94.5 HRA。With polyvinyl pyrrolidone as boron carbide and carbon black dispersant;Four methyl ammonium hydroxide as silicon carbide dispersion agent,respectively with acrylamide,N,N＇-methylene diacrylamide and a crosslinking agent,the gel casting process for preparation of boron carbide/carbide body,after high temperature sintering,preparation of boron carbide/silicon carbide sintered body specimen.The results show that： the green body bending strength with solid content increases,when the solid content is 55vol% strength reaches 24.3 MPa.To some extent,fracture toughness can be improved increasing with the content of B4C.When the content of B4C is 10wt%,the maximum fracture toughness of composite is 5.07 MPa.m1/2.The hardness of sintered bodies increases with the increasing of B4C content.The hardness is as high as 94.5 HRA when the content of B4C is 20wt%.

关 键 词：反应烧结 B4C SIC复合材料 性能测试 

分 类 号：TB321[一般工业技术—材料科学与工程]