Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第22卷    第10期    总第163期    2012年10月

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文章编号:1004-0609(2012)10-2790-07
原位反应合成(TiB2-Al2O3)/NiAl复合材料的微观组织
曹丽丽1, 2, 崔洪芝1, 吴  杰1, 汤华杰1

(1. 山东科技大学 材料科学与工程学院,青岛 266590;
2. 机械科学研究总院 先进制造技术研究中心,北京 100083
)

摘 要: 通过Ni、Al、TiO2和B2O3粉末之间的原位反应合成(TiB2-Al2O3)/NiAl复合材料,研究材料的物相组成和组织结构,并对典型组织的形成过程进行探讨。结果表明:反应产物由NiAl、TiB2和Al2O3这3种相组成。基体由NiAl和Al2O3组成,而TiB2颗粒规则,尺寸2~5 μm,呈簇状镶嵌在Al2O3中,少量弥散分布在NiAl基体上。分析认为TiB2的晶体结构、含量、所处NiAl熔体环境以及极快的冷却速度是影响其生长形态和分布的主要原因。

 

关键字: TiB2-Al2O3;NiAl;复合材料;原位合成;微观组织

Microstructures of (TiB2-Al2O3)/NiAl composite prepared by in-situ reaction synthesis
CAO Li-li1, 2, CUI Hong-zhi1, WU Jie1, TANG Hua-jie1

1. School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
2. Advanced Manufacture Technology Center, China Academy of Machinery Science and Technology,
Beijing 100083, China

Abstract:(TiB2-Al2O3)/NiAl composite materials were synthesized by in-situ reaction from Ni, Al, TiO2 and B2O3 mixed powders. The phase composition, microstructure and formation mechanism of typical microstructure were studied. The results show that the products contain NiAl, TiB2 and Al2O3 phases; the matrix is made of NiAl and Al2O3 phases; and the regular TiB2 particles are in size range of 2−5 μm, which are embedded by Al2O3 in clusters. A small amount of TiB2 particles disperse in the NiAl matrix. It is believed that the crystal structure, content, surroundings of molten NiAl and the fast cooling speed are the main reasons for determining the morphology and distribution of TiB2 particles.

 

Key words: TiB2-Al2O3; NiAl; composite material; in-situ synthesis; microstructure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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