Wear properties of NiAl based materials
Wear properties of NiAl based materials
复制标题
DOI：
10.1016/j.pnsc.2012.10.008
复制
发表时间：
2012-10
期刊：
影响因子：
--
通讯作者：
Jian-ting Guo;Zhensheng Wang;L. Sheng;Lanzhang Zhou;C. Yuan;Zhi-gang Chen;Liguo Song
中科院分区：
文献类型：
--
作者：
Jian-ting Guo;Zhensheng Wang;L. Sheng;Lanzhang Zhou;C. Yuan;Zhi-gang Chen;Liguo Song
制备了NiAl-TiC-Al 2 O3复合材料、NiAl-Cr（Mo）-Hf-Ho共晶合金和NiAl-Cr（Mo）-CrxSi原位复合材料，并测试了它们在不同温度下的磨损性能。结果表明，NiAl-TiC-Al 2 O3复合材料、NiAl-Cr（Mo）-Hf-Ho共晶合金和NiAl-Cr（Mo）-CrxSi原位复合材料在700°C ~ 900°C范围内具有优异的耐磨性能。显微组织观察表明，在高温干滑动试验中，磨损表面形成了自润滑膜，显著降低了磨损率和摩擦系数。TEM观察表明，自润滑膜主要由陶瓷、非晶和纳米晶组成。与NiAl-TiC-Al 2 O3复合材料相比，NiAl-Cr（Mo）-CrxSi原位复合材料具有较低的低温摩擦系数。这可能是由于硫化物的加入有助于形成自润滑剂，而TiC的加入提高了NiAl基材料的强度和耐磨性。
The NiAl based materials including NiAl–TiC–Al2O3composite, NiAl–Cr(Mo)–Hf–Ho eutectic alloy and NiAl–Cr(Mo)–CrxSyin situ composite were fabricated and their wear properties were tested at different temperatures. The results revealed that the NiAl–TiC–Al2O3composite, NiAl–Cr(Mo)–Hf–Ho eutectic alloy and NiAl–Cr(Mo)–CrxSyin situ composite exhibited the excellent wear properties between 700°C and 900°C. The microstructure observations exhibited that the self-lubricant films formed on the worn surfaces during the dry sliding test at high temperature, which decreased the wear rate and friction coefficient significantly. TEM observation on the self-lubricant film revealed that it was mainly comprised by ceramic amorphous and nanocrystalline. Compared with the NiAl–TiC–Al2O3composite, the NiAl–Cr(Mo)–CrxSyin situ composite has lower friction coefficient at low temperature. Such phenomena may be ascribed to the addition of sulfide which contributes much to the formation of self-lubricant, and moreover the TiC addition increase the strength of NiAl based material and its wear resistance.