摘要
研究了Ti和B颗粒尺寸的变化对自蔓延高温合成(SHS)TiB_2—xAl金属基复合材料的燃烧温度和燃烧波速度的影响。结果表明,Al颗粒不直接参与化学反应,其尺寸变化对SHS过程的影响要小得多,但是反应过程中形成的熔融Al能阻止TiB_2晶粒的长大,因而可以控制SHS产物的结构。通过燃烧波峰淬熄(CFQ)法,对该复合材料的SHS过程结构形成机理进行了分析。
Effect of of Ti or B particle size on the combustion temperature and propa gating rate in the self propagating high temperature synthesis(SHS) process of TiB_2-xAl composites has been investigated.The size change of Al particles,which does not directly enter into the chemical reaction as Ti and B,may be much less influential to the SHS process.But the molten Al, formed during reaction, may retard the growth of TiB_2grains. Thus, the structure of SHS product can be controlled.By means of combustion front quenching (CFQ) with copper wedge, the structure formation of TiB_2-xAl composites in the SHS process was discussed
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第8期B373-B378,共6页
Acta Metallurgica Sinica
关键词
TiB2-xAl
复合材料
结构形成分析
TiB_2-xAl composite,structure formation, self propagating high temperature synthesis