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熱壓燒結(jié)反應(yīng)生成TiB／Ti-4．0Fe-7．3Mo復(fù)合材料的組織與性能
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TG146.4

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Microstructure and Mechanical Properties of Reaction Synthesized TiB/Ti-4.0Fe-7.3Mo Composites by Hot Press Sintering
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    摘要:

    采用機(jī)械合金化(MA)的方法將B和FeMo粉末與金屬Ti的粉末混合均勻，球磨10h后，真空熱壓燒結(jié)制備原位生成TiB增強(qiáng)Ti-4．0Fe-7．3Mo復(fù)合材料。在金相顯微鏡(OM)下觀察，復(fù)合材料由TiB增強(qiáng)區(qū)與不含TiB的基體所組成。TEM研究表明：增強(qiáng)區(qū)足由反應(yīng)生成的TiB增強(qiáng)的α和β-Ti2相共同組成，在α和β-Ti相交界處分布的TiB不僅尺寸較人，而且數(shù)量也較兩相內(nèi)部的TiB多。在α鈦中觀察到少量的平行于α相板條的特殊TiB的存在。反應(yīng)生成的TiB呈截面為六邊形的針狀，與基體的界面清潔、平直匹配良好。復(fù)合材料的三點(diǎn)彎曲強(qiáng)度和楊氏模量均隨反應(yīng)生成TiB體積含量的增加而降低。

    Abstract:

    The mechanical alloying (MA) route was used to mix uniformly boron powder, FeMo powder and titanium powder. The mixed powder was vacuum hot press sintered and TiB was formed in-situ during the process. Typical microstructure of the composites has two kinds of areas under optical microscope (OM): in situ TiB reinforced Ti MMCs and the isolated unprocessed material. TEM investigation of the TiB reinforced composites show that these areas are made up of in situ TiB reinforced and Ti matrix. The size and distribution of in situ TiB are different in boundaries and inner of and Ti phases. Most of the in situ TiB needles are random distributed. The transverse section of the in situ TiB needle is hexagonal. The interface between in situ TiB and the Ti MMCs is clear, flat and sharp without any interfacial reaction. The strength and Youngs modulus of the TiB reinforced TMCs decreased with the increasing of in situ TiB volume content.

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馮海波 賈德昌 周玉 霍潔.熱壓燒結(jié)反應(yīng)生成TiB／Ti-4．0Fe-7．3Mo復(fù)合材料的組織與性能[J].稀有金屬材料與工程,2004,33(6):635~640.[Feng Haibo, Jia Dechang, Zhou Yu, Huo Jie. Microstructure and Mechanical Properties of Reaction Synthesized TiB/Ti-4.0Fe-7.3Mo Composites by Hot Press Sintering[J]. Rare Metal Materials and Engineering,2004,33(6):635~640.]
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  • 最后修改日期:2002-12-10
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