反应烧结氮化硅陶瓷的连接  

JOINING OF REACTION SINTERED SILICON NITRIDE CERAMICS

作　　者：张电[1] 徐永东[1] 张立同[1] 成来飞[1] 马军强[1] 

机构地区：[1]西北工业大学超高温结构复合材料国防科技重点实验室,西安710072

出　　处：《硅酸盐学报》2006年第10期1177-1181,共5页Journal of The Chinese Ceramic Society

基　　金：陕西省科技攻关(2002K07-G5)资助项目

摘　　要：用硅粉、黏土、硅溶胶配制的浆料作为焊料,在1390℃氮化烧结过程中,对经过预氮化的氮化硅陶瓷进行无压反应烧结连接。实验表明:黏土的加入改善了焊料塑性,形成了较致密的接头,连接强度达到40MPa。焊料经反应烧结后生成了Si3N4和O′-sialon,与母材具有物理化学相容性。焊料/母材界面处形成了针状sialon晶体交织的网络结构,将焊料与母材互锁成为一个整体,起到很好的界面结合作用。焊料的反应烧结和焊料/母材界面反应都为溶解-沉淀机理控制。Adhesives prepared by mixing the silicon powder, clay and silica sol were used to join the pre-nitridized silicon nitride ceramics by pressureless reaction sintering method at 1390℃. The results indicated that clay could enhance the plasticity of the adhesives, form a compact joint and obtain a bonding strength of 40 MPa. The sintered adhesive is mainly composed of S3N4 and O＇- sialon, which have good physical chemistry compatibility with the parent material. Sialon acerous crystal has formed at the interface between the adhesive and parent material and formed an interlocking network, which integrated these two parts, providing good interrace bonding. Analysis indicated that the mechanism of the adhesive sinter and interface reaction is a dissolution-precipitation process.

关 键 词：氮化硅 连接 焊料 赛龙 

分 类 号：TQ174[化学工程—陶瓷工业]