Effects of Ignition Mode on Microstructure of Al-Ti-C Master Alloy Prepared by SHS

Hou Yunfeng; Xia Tiandong; Zhao Wenjun

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Effects of Ignition Mode on Microstructure of Al-Ti-C Master Alloy Prepared by SHS
Issue 5, Pages: 396-398(2007)
Published：2007
DOI：
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[1]侯运丰,夏天东,赵文军.引燃模式对自蔓延高温合成Al-Ti-C中间合金的影响[J].特种铸造及有色合金,2007(05):396-398+327-328. DOI：

Hou Yunfeng, Xia Tiandong, Zhao Wenjun. Effects of Ignition Mode on Microstructure of Al-Ti-C Master Alloy Prepared by SHS[J]. Special Casting & Nonferrous Alloys, 2007, (5): 396-398. DOI：

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。

Abstract

Effects of ignition mode on microstructure of Al-Ti-C master alloy prepared by SHS with Al

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.