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球磨工藝對原位合成納米級TiB的影響
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吉林大學(xué)材料學(xué)院 教育部汽車材料重點實驗室,吉林大學(xué)材料學(xué)院 教育部汽車材料重點實驗室,吉林大學(xué)材料學(xué)院 教育部汽車材料重點實驗室,吉林大學(xué)材料學(xué)院 教育部汽車材料重點實驗室,吉林大學(xué)材料學(xué)院 教育部汽車材料重點實驗室

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TG

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吉林省自然科學(xué)基金


Effect of ball milling process on the in situ synthesizing of nano-TiB whiskers
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Key Laboratory of Automobile Materials,Ministry of Education,and Department of Materials Science and Engineering,Jilin University,Key Laboratory of Automobile Materials,Ministry of Education,and Department of Materials Science and Engineering,Jilin University,Key Laboratory of Automobile Materials,Ministry of Education,and Department of Materials Science and Engineering,Jilin University,Key Laboratory of Automobile Materials,Ministry of Education,and Department of Materials Science and Engineering,Jilin University,Key Laboratory of Automobile Materials,Ministry of Education,and Department of Materials Science and Engineering,Jilin University

Fund Project:

JiLin Province Natural Science Foundation of China

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    摘要:

    球磨工藝對球磨粉末及其燒結(jié)組織的微觀結(jié)構(gòu)和形態(tài)都有重要的影響。本實驗采用低能和高能球磨兩種方式對Ti-Al-0.2B wt.%合金粉末進(jìn)行球磨,研究球磨過程中粉末組織和形態(tài)的變化,并將球磨后的粉末進(jìn)行熱壓燒結(jié),研究不同球磨方式對燒結(jié)組織中原位合成TiB增強相形態(tài)的影響。研究結(jié)果表明：低能球磨過程中粉末顆粒間有機械合金化發(fā)生,其燒結(jié)組織中生成的TiB為細(xì)長態(tài),在基體中分布均勻,沒有聯(lián)結(jié)的粗晶或成簇生長現(xiàn)象。對于高能球磨,粉末顆粒細(xì)化效果明顯,顆粒平均尺寸降至1 μm,球磨過程中除了機械合金化還形成了Ti(Al)過飽和固溶體,并在球磨后期形成了非晶結(jié)構(gòu)。經(jīng)高能球磨的粉末燒結(jié)后,組織中生成了均勻分布的納米級TiB晶須。

    Abstract:

    Ball milling process has an important effect on the microstructure of final powder products and the corresponding as-sintered samples. In this study, Ti-Al-0.2B wt.% mixed powders were ball-milled by low-energy and high-energy types of ball mills, and then the milled powders were sintered by hot- pressing. On this basis, morphology evolution of the powders was analyzed, and the microstructure of the reinforcements in the as-sintered composites was investigated. In the low-energy ball milling process, mechanical alloying was occurred between the powder particles. TiB whiskers formed in sintering process were long and thin without coarse bars or clusters. For the high-energy type, the particle size was refined remarkably to 1um, and Ti (Al) supersaturated solid solution or even amorphous structure was formed during the milling process. In the following sintering process, nano-scale TiB whiskers were synthesized and they were uniformly distributed in the matrix.

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劉利萍,劉勇兵,姬連峰,曹占義,楊曉紅.球磨工藝對原位合成納米級TiB的影響[J].稀有金屬材料與工程,2016,45(5):1157~1161.[Liu Liping, Liu Yongbing, Ji Lianfeng, Cao Zhanyi, Yang Xiaohong. Effect of ball milling process on the in situ synthesizing of nano-TiB whiskers[J]. Rare Metal Materials and Engineering,2016,45(5):1157~1161.]
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  • 收稿日期:2015-04-03
  • 最后修改日期:2015-07-16
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2016-06-02
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