Fabrication of titanium diboride-carbon core-shell structure particles and their application as high-efficiency grain refiners of wrought aluminum alloys

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• 作者：Jinfeng Nie ; ^{niejf29@yahoo.com.cn} ; Haimin Ding ; Yuying Wu ; Xiangfa Liu ^{xfliu@sdu.edu.cn}
• 关键词：Casting ; HRTEM ; TiB2 ; Aluminum alloy ; Grain refining
• 刊名：Scripta Materialia
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：68
• 期：10
• 页码：789-792
• 全文大小：611 K

文摘

A facile method for the synthesis of titanium diboride core-shell structure particles (TiB₂@C) was developed utilizing the transformation from TiC to TiB₂ in aluminum melt. The particles display hexagonal platelet morphology, with a length of about 800 nm and a thickness of about 200 nm. Carbon layers 4 nm thick are homogeneously coated on the TiB₂. Grain refining tests on commercial pure aluminum alloy indicate that TiB₂@C particles display a higher grain refining efficiency than TiB₂.