Synergetic lubricating effect of MoS₂ and Ti₃SiC₂ on tribological properties of NiAl matrix self-lubricating composites over a wide temperature range

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• 作者：Xiaoliang Shi ; Wenzheng Zhai ; Zengshi Xu ; Mang Wang ; Jie Yao ; Siyuan Song ; Yufu Wang
• 关键词：Sliding friction and wear ; Self-lubricating composites ; Tribological behavior ; Wear mechanisms
• 刊名：Materials and Design
• 出版年：March, 2014
• 年：2014
• 卷：55
• 期：Complete
• 页码：93-103
• 全文大小：5338 K

文摘

NiAl matrix self-lubricating composites with MoS₂ and Ti₃SiC₂ lubricants were prepared by spark plasma sintering. The tribological behaviors of the NiAl-Ti₃SiC₂-MoS₂ composites against Si₃N₄ were investigated from room temperature to 800 掳C. The results showed that the composites exhibited excellent self-lubricating and anti-wear properties over a wide temperature range. At 400 掳C, the composites containing 5Ti₃SiC₂-5MoS₂ (wt.%) had a very low friction coefficient of about 0.13 and a low wear rate of 4.5 脳 10^鈭? mm³ N^鈭? m^鈭?. MoS₂ played the main role of lubrication at low temperatures, while Ti₃SiC₂ was responsible for low friction at high temperatures. Ti₃SiC₂ and MoS₂ lubricants in the NiAl-Ti₃SiC₂-MoS₂ composites showed the excellent synergetic lubricating effect over a wide temperature range from room temperature to 800 掳C.