Effect of Cu content in Cu-Ti-B₄C system on fabricating TiC/TiB₂ particulates locally reinforced steel matrix composites

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• 作者：Yunhong Liang ; Zhiwu Han ; Zhihui Zhang ; Xiujuan Li ; Luquan Ren ; ^{lqren@jlu.edu.cn}
• 关键词：A. Metal matrix composites ; C. Casting ; E. Wear
• 刊名：Materials and Design
• 出版年：2012
• 期刊代码：56_02613069
• 类别：ms
• 出版时间：September, 2012
• 卷：40
• 期：Complete
• 页码：64-69
• 文件大小：1049 K

摘要

The austenite manganese steel-matrix composites locally reinforced with in situ TiC/TiB₂ particulates were successfully fabricated using self-propagating high-temperature synthesis (SHS) reactions in a Cu-Ti-B₄C system and the effect of the Cu content during casting has been investigated. The local reinforcing regions in the steel matrix composites mainly consist of TiC, TiB₂, Cu and austenite, without any intermediate phases. With the increase in the Cu content, the size of the ceramic particulates in the local reinforcing regions decreases, the interface bonding between reinforcing region and matrix becomes poor and the macro-pores and blowholes in the local reinforcing regions become fewer. Moreover, with the increase in the Cu content, the hardness value decreases monotonically, while the wear resistance of the reinforced region increases first then decreases.