| 引燃模式对自蔓延高温合成Al-Ti-C中间合金的影响 |
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| 引用本文： | 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,2007,27(5):396-398. |
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| 作者姓名： | 侯运丰 夏天东 赵文军 |
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| 作者单位： | 兰州理工大学有色金属新材料省部共建国家重点实验室 |
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| 基金项目： | 国家高技术研究发展计划(863计划);甘肃省自然科学基金 |
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| 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。
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| 关 键 词： | 引燃模式 自蔓延高温合成 Al-Ti-C中间合金 微观组织 |
| 文章编号： | 1001-2249（2007）05-0396-03 |
| 修稿时间： | 2006-12-22 |
Effects of Ignition Mode on Microstructure of Al-Ti-C Master Alloy Prepared by SHS |
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| 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,2007,27(5):396-398. |
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| Authors: | Hou Yunfeng Xia Tiandong Zhao Wenjun |
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| Abstract: | 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. |
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| Keywords: | Ignition Mode SHS Al-Ti-C Master Alloy Microstructure |
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