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等離子旋轉(zhuǎn)電極法制備鈦鋁粉末性能表征
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Characterization of TiAl Powders Prepared by Plasma Rotating Electrode Processing
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國家自然科學基金(50674056)；南昌航空大學科研基金(EC200701022)

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    摘要:

    采用等離子束旋轉(zhuǎn)電極法制備Ti-47Al-2Cr-2Nb球形粉末，粉末的平均粒徑d50為85 μm, 松裝密度為2.65 g/cm3。截線法測得粉末的球形度為99.6%；粉末的流動性為10.40 s/50 g；粉末的平均氧、氮含量分別為0.05%和0.004%。XRD分析表明，粉末的相組成為α2相和γ相，主相為富鈦α2相；粉末經(jīng)熱等靜壓后主相為γ相，伴隨少量α2相。SEM背散射照片表明，粉末顆粒的晶粒為胞狀組織，晶粒平均大小約為2 μm；對不同粒徑的顆粒進行EPMA分析表明，顆粒內(nèi)部化學成分與預(yù)合金棒接近，顆粒表面有部分Al元素揮發(fā)，約為2at%

    Abstract:

    Friction stir processing (FSP) was summarized in detail. Its effect on properties of materials and the research on preparation of composites and alloys were also introduced. In addition, the problems of FSP research, the prospect and the future development were pointed out. The influencing factors and formation mechanism of the abnormal grain growth need further studies. FSP combined with melt welding can meet the requirement of welding of high strength materials such as titanium alloys. There will be a good application future for FSP to prepare nano-particles enforced metal matrix composites (MMCs) and intermetallic composites (IMCs). An inventive technique to fabricate materials with homogeneous microstructure by adopting the concepts of FSP is pivotal for its applications

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楊 鑫,奚正平,劉 詠,湯慧萍,賀衛(wèi)衛(wèi),賈文鵬.等離子旋轉(zhuǎn)電極法制備鈦鋁粉末性能表征[J].稀有金屬材料與工程,2010,39(12):2251~2254.[Yang Xin, Xi Zhengping, Liu Yong, Tang Huiping, He Weiwei, Jia Wenpeng. Characterization of TiAl Powders Prepared by Plasma Rotating Electrode Processing[J]. Rare Metal Materials and Engineering,2010,39(12):2251~2254.]
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  • 收稿日期:2010-07-29
  • 最后修改日期:2010-12-01
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