首页> 外文期刊>Journal of Materials Engineering and Performance >Tribological Properties of In Situ-Fabricated NiCr-Al(2)O(3)Composites with SrAl(4)O(7)and SrO at Elevated Temperatures
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Tribological Properties of In Situ-Fabricated NiCr-Al(2)O(3)Composites with SrAl(4)O(7)and SrO at Elevated Temperatures

机译:在原位制造的NiCr-Al(2)O(3)复合材料的摩擦学性质,其具有SRAL(4)O(7)和升高的温度下的SRO

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摘要

The effect of the interaction between SrO and SrAl(4)O(7)with monoclinic and/or orthorhombic structures on the tribological performance of NiCr-Al(2)O(3)composites was evaluated over a wide temperature range. The results indicated that the formation of SrO and SrAl(4)O(7)with monoclinic and/or orthorhombic structures was effective in improving the friction and wear properties of the sintered composites at elevated temperatures. At 400 degrees C, the monoclinic-SrAl4O7, SrO and oxides (NiCr2O4, NiO, and Cr2O3) endowed the sintered composites with low friction coefficient and wear rate. When the temperature was above 600 degrees C, the tribolayer containing monoclinic-SrAl4O7, orthorhombic-SrAl(4)O(7)and oxides exhibited better tribological properties than the tribofilm consisting of monoclinic-SrAl4O7, SrAl(12)O(19)and oxides. Furthermore, at 800 degrees C, the appearance of orthorhombic-SrAl(4)O(7)on the worn surface led to a low friction coefficient and wear rate.
机译:在较宽的温度范围内,研究了单斜和/或正交结构的SrO和SrAl(4)O(7)之间的相互作用对NiCr-Al(2)O(3)复合材料摩擦学性能的影响。结果表明,形成具有单斜和/或正交结构的SrO和SrAl(4)O(7)可以有效地改善烧结复合材料的高温摩擦磨损性能。在400℃时,单斜相SrAl4O7、SrO和氧化物(NiCr2O4、NiO和Cr2O3)赋予烧结复合材料较低的摩擦系数和磨损率。当温度高于600℃时,含有单斜晶SrAl4O7、正交晶SrAl(4)O(7)和氧化物的摩擦层比含有单斜晶SrAl4O7、SrAl(12)O(19)和氧化物的摩擦膜表现出更好的摩擦学性能。此外,在800℃时,磨损表面上出现正交晶态SrAl(4)O(7),导致摩擦系数和磨损率较低。

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