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Ti—Al二元粉末機械合金化過程中組織結(jié)構(gòu)的變化
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TF123.111 TG146.2

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國家自然科學(xué)基金資助項目(項目號59875015)


Evolution of Microstructures of Ti/Al Binary Powders During Mechanical Alloying Process
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    摘要:

    對二元Ti-Al粉末進行機械球磨,結(jié)果表明,隨著球磨時間的增加,粉末顆粒度初期有明顯增加,然后急劇下降,再變緩,最終不再變化;Ti-Al粉末在機械合金化過程中,先形成了棗羔式Ti在Al中的鑲嵌,現(xiàn)形成明顯的片層結(jié)構(gòu),隨時間延長,片層間距又迅速減小直至Ti/Al界面消失,最終形成非晶,但并無Ti-Al金屬間化合物的形成,且隨球磨速度的增加片層細(xì)化速率加快。

    Abstract:

    The mechanically milled Ti-Al binary composite powders were observed and analyzed using SEM, EPM and TEM. The experimental results show that with increasing milling time, particle sizes of composite powders remarkably and rapidly increase at first, then greatly decrease, and finally decrease to a constant. The Ti particles form "jujube-cake" in Al powders during mechanical alloying. With increasing time, a obvious lamellar structure forms, lamellar spacing decreases and TiIA1 interfaces disappear, and finally amorphous structure forms. However, the Ti-Al intermetallic compounds did not produce during the whole process.

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李小強 胡連喜 等. Ti—Al二元粉末機械合金化過程中組織結(jié)構(gòu)的變化[J].稀有金屬材料與工程,2001,(3):183~186.[Li Xiaoqiang, Hu Lianxi, Wang Erde. Evolution of Microstructures of Ti/Al Binary Powders During Mechanical Alloying Process[J]. Rare Metal Materials and Engineering,2001,(3):183~186.]
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  • 最后修改日期:2001-03-05
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