Effects of Chemical Composition and B-Fe on Ti-Al Base Intermetallic Compound by SHS

Mu Baichun Li Qiang Yu Jingyuan Tang Lidan

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Effects of Chemical Composition and B-Fe on Ti-Al Base Intermetallic Compound by SHS
Issue 2, Pages: 27-29(2004)
Published： 2004 ，
DOI：

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[1]穆柏春,,,,,,,,,李强,,,,,,,,,于景媛,,,,,,,,,唐立丹,,,,,,,,,孙旭东.成分配比和B-Fe对高温合成Ti-Al的影响[J].特种铸造及有色合金,2004(02):27-29+2.

Mu Baichun Li Qiang Yu Jingyuan Tang Lidan. Effects of Chemical Composition and B-Fe on Ti-Al Base Intermetallic Compound by SHS. [J]. Special Casting & Nonferrous Alloys (2):27-29(2004)
[1]穆柏春,,,,,,,,,李强,,,,,,,,,于景媛,,,,,,,,,唐立丹,,,,,,,,,孙旭东.成分配比和B-Fe对高温合成Ti-Al的影响[J].特种铸造及有色合金,2004(02):27-29+2. DOI：

Mu Baichun Li Qiang Yu Jingyuan Tang Lidan. Effects of Chemical Composition and B-Fe on Ti-Al Base Intermetallic Compound by SHS. [J]. Special Casting & Nonferrous Alloys (2):27-29(2004) DOI：

摘要

以Ti粉、Al粉、B Fe为主要原料

采用自蔓延高温合成技术

制备Ti Al基金属间化合物。研究了自蔓延高温合成技术

成分配比

B Fe以及高温装炉对热爆反应的影响

分析了热爆反应机理以及热爆产物显微组织。结果表明 :随Al含量的减少、加热速度的提高

热爆起始时间缩短、热爆反应峰值增加 ;加入适量B Fe可以延缓Ti Al基金属间化合物的热爆反应

抑制Ti3Al的择优生长

达到细化晶粒的效果。反应产物主要为针状或细棒状α2 （Ti3Al）和γ（TiAl）两相

Abstract

Ti-Al base intermetallic compound was prepared by SH S with Ti powder

Al powder and B-Fe as basic raw materials. Effects of SHS techn ique

chemical compositions

B-Fe and charge in preheated furnace at high tempe rature on thermal explosion were researched. The mechanism of thermal explosion and the microstructure of thermal exploded product were analyzed. The results sh owed that the begi nning time of the thermal explosion reduces and the exothermic peak value rose with decrease in Al content and increase in heating rate. The grain refinement c an be realized by restraining the preferable growth of Ti 3Al and delaying the thermal explosion of Ti-Al base intermetallic compound with proper B-Fe additi on. The thermal exploded products consists of needle-like or fine-bar α 2（Ti 3Al） and γ（TiAl） phases.

关键词

自蔓延高温合成（SHS）Ti-Al基金属间化合物B-Fe合金

Keywords

SHSTi-Al Base Intermetallic CompoundB-Fe Alloy

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Preparation of In-situ MoSi₂-Fe Composites by SHS-casting