摘要
利用Al、Ti、C粉末原料,采用自蔓延高温合成技术(SHS)合成了Al-Ti-C中间合金晶粒细化剂。借助X射线衍射(XRD)、扫描电子显微镜(SEM)研究了引燃模式对自蔓延高温合成反应过程及合成产物组织形态的影响。结果表明:两种引燃模式下自蔓延高温合成的Al-Ti-C中间合金由Al、Al3Ti和TiC组成,引燃模式对Al-Ti-C的组织形貌产生重要影响,自蔓延模式下燃烧温度低,合成产物中的第二相粒子细小分散,而热爆模式下燃烧温度高,Al3Ti、TiC长大聚集,影响其晶粒细化性能。
Effects of ignition mode on microstructure of Al-Ti-C master alloy prepared by SHS with Al, Ti, C powder have been observed by XRD(X-ray diffraction), SEM(scanning electron microscope). The results indicate that the SHS synthesized master alloy consist of Al, Al3Ti and TiC phase. The fine second phase particle is dispersively distributed into the master alloy due to the low combustion synthesized temperature in self-propagating mode while Al3Ti, TiC particle can be grown to aggregate in the master alloy due to high combustion synthesized temperature in thermal explosion mode, which can affect the grain refining performance to some extent.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第5期396-398,共3页
Special Casting & Nonferrous Alloys
基金
国家高技术研究发展计划(863计划)资助项目
甘肃省自然科学基金项目(3ZS042-B25-011)资助
