Synthesis of Nanocrystalline (W, Ti)C from Respective Elemental Powders by Mechanical Alloying and Spark Plasma Sintering
Synthesis of Nanocrystalline (W, Ti)C from Respective Elemental Powders by Mechanical Alloying and Spark Plasma Sintering
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DOI：
10.4028/www.scientific.net/amr.306-307.1728
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发表时间：
2011-08
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影响因子：
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通讯作者：
Jialin Liang;Chao Yang;Xiao Qiang Li;S. Qu;Y. Li
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作者：
Jialin Liang;Chao Yang;Xiao Qiang Li;S. Qu;Y. Li
研究了用放电等离子烧结法合成纳米晶（W，Ti）C的可能性。结果表明，湿磨过程中生成了WxTi 1-x，而不是直接生成（W，Ti）C，并使石墨C转变为非晶相，包裹在生成的WxTi 1-x周围。同时，在湿磨条件下，球磨70 h的元素混合粉末的晶粒尺寸达到50 nm左右。随后，通过放电等离子烧结70 h球磨的元素混合粉末，成功地合成了纳米晶（W，Ti）C。基于我们提出的模型，我们简单地解释了由MA产生的WxTi（1-x）和非晶C通过SPS形成（W，Ti）C相。
The possibility of synthesizing nanocrystalline (W, Ti)C is investigated by spark plasma sintering of mechanically alloyed elemental mixed powders of W, Ti and C. The results show that wet-milling generates WxTi1-x instead of directly forming (W, Ti)C, and makes the graphite C transform into amorphous phase surrounding the formed WxTi1-x. Meanwhile, the grain size of the 70 h milled elemental mixed powders reaches about 50 nm under the wet-milling condition. Subsequently, nanocrystalline (W, Ti)C is successfully synthesized by spark plasma sintering of the 70 h milled elemental mixed powders. The formation of (W, Ti)C phase by SPS from the WxTi1-x and amorphous C generated by MA is simply explained based on our proposed model.