氧化锆陶瓷基高温自润滑材料

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In order to develop materials with good tribological behavior at a wide temperature range （especially at high temperatures）, a series of ZrO2 （ Y2 O3 ） matrix composites which contain various of solid lubricants （ Mo、 MoS2、 BaF2、CaF2、 BaF2/CaF2、 CuO ） were prepared by hot-pressing. Among them, ZrO2 （ Y203 ） - Mo-BaF2/CaF2 composites show low friction coefficient in the range of 800 to 1 000℃. At 1 000℃, the friction coefficient is 0. 28 which is close to the engineering application value. The friction coefficients of the ZrO2（ Y203 ）-MoSE-CaF2 compos-ites are 0. 30 to 0.20 when sliding against SiC in the range of 800 to 1 000℃. The ZrO2（ Y2O3 ）-MoS2-CaF2 compos-ites have good friction and wear performance over a wide temperature range. The excellent high-temperature tribologi-cal behavior was mainly attributes to the high-temperature stability of the ZrO2 and the high lubricity of molybdate which formed on the worn surface at high temperature.为了解决较宽温域范围内特别是高温下材料的润滑问题,本文采用热压烧结方法制备了一系列含各种不同固体润滑剂（Mo、MoS2、BaF2、CaF2、BaF2/CaF2、CuO）的氧化锆基高温自润滑陶瓷复合材料。其中ZrO2（Y2O3）-Mo-BaF2/CaF2系列复合物在800～1000℃表现出较低的摩擦因数,在1000℃摩擦因数低至0.28左右,已接近工程应用的许用值;另一种ZrO2（Y2O3）-MoS2-CaF2系列复合物同SiC陶瓷球对磨时在800～1000℃内摩擦因数为0.30～0.22,具有较好的摩擦磨损性能。