Effects of TiH<sub>2</sub> on Microstructure and Refining Behavior of Al-Ti-B Master Alloy Prepared by SHS

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Effects of TiH₂ on Microstructure and Refining Behavior of Al-Ti-B Master Alloy Prepared by SHS
Issue 11, Pages: 887-890(2007)
Published： 2007 ，
DOI：

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[1]庄洪宇,潘学民.TiH_2对合成Al-Ti-B合金组织及细化行为的影响[J].特种铸造及有色合金,2007(11):887-890+819-820.

Zhuang Hongyu, Pan Xuemin. Effects of TiH₂ on Microstructure and Refining Behavior of Al-Ti-B Master Alloy Prepared by SHS. [J]. Special Casting & Nonferrous Alloys (11):887-890(2007)
[1]庄洪宇,潘学民.TiH_2对合成Al-Ti-B合金组织及细化行为的影响[J].特种铸造及有色合金,2007(11):887-890+819-820. DOI：

Zhuang Hongyu, Pan Xuemin. Effects of TiH₂ on Microstructure and Refining Behavior of Al-Ti-B Master Alloy Prepared by SHS. [J]. Special Casting & Nonferrous Alloys (11):887-890(2007) DOI：

摘要

应用激光引燃自蔓延高温合成技术制备添加TiH2及不添加TiH2的两种Al-Ti-B中间合金。采用X射线衍射仪、电子探针、扫描电镜和差热分析仪等检测两种中间合金的相组成、分布、组织形貌及自蔓延反应热分析过程。结果表明:在合成Al-Ti-B中间合金过程中

TiH2对自蔓延反应具有明显的促进作用

分析认为TiH2受热分解出高活性Ti原子及具有催化作用的H原子

从而降低了自蔓延的反应温度

并改变了TiAl3和TiB2的形态和分布（TiB2的平均直径小于0.5μm）

减小了TiB2的聚集倾向。添加TiH2的中间合金组织构成及形貌更适合细化处理

因而其对工业纯铝的细化效果优于不添加TiH2的中间合金。

Abstract

The Al-Ti-B master alloys with and without TiH2 have been prepared by SHS（high-temperature synthesis） with inducing by laser.The phase constituent

distribution

microstructure morphologies of master alloys and its thermal reaction were analyzed by XRD

EPM

DTA and SEM.The results reveal that the TiH2 addition has a positive role for promoting the reaction synthesis of the Al-Ti-B master alloy

which is attributed to high active Ti atoms and catalyzing H atom released by TiH2 thermal decomposition reducing the reaction temperature and changing the morphologies and distribution of TiAl3 and TiB2 particles（the average diameters of the TiB2 particles lower than 0.5 μm） to relief the segregation of TiB2.The refining effects of the Al-Ti-B master alloy with TiH2 on industrial pure aluminum is superior to that of ones without TiH2 due to its structure and morphology more suitable for refining treatment.

关键词

激光TiH2自蔓延高温合成Al-Ti-B中间合金

Keywords

LaserTiH2SHSAl-Ti-B Master Alloy

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相关作者

石随林军械工程学院

王建江军械工程学院

王双喜军械工程学院

李淑华军械工程学院

Li Junshou 军械工程学院

Gao Hongwu 大连理工大学

Liu Yu 大连理工大学

Liu Shikui 大连理工大学

相关机构

Ordance Engineering College,,) Li Shuhua Wang Shuangxi Wang Jianjiang Shi Suilin

Dalian University of Science and Technology

Key Laboratory of Materials Liquid Structure and Heredity, Ministry of Education, Shandong University

Lanzhou University of Science and Technology

School of Mechanical Engineering, Xiangtan University

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