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研究了RE-Ni-W-P-SiC多功能复合材料的抗高温氧化性能,结果表明,在高温氧化过程中,纯镍镀层、Ni-W-P、Ni-W-P-SiC和RE-Ni-W-P-SiC复合镀层的氧化膜质量和氧化时间的关系呈混合型曲线,即直线和曲线复合的规律。在氧化时间小于60min时,氧化膜的增长规律近似于直线方程;而在氧化时间大于60min后,它的增长规律可以用幂函数方程表示。4种镀层氧化速率的大小顺序是Ni>Ni-W-P>Ni-W-P-SiC>RE-Ni-W-P-SiC。Ni-W-P、Ni-W-P-SiC和RE-Ni-W-P 3种镀层的氧化膜质量随着氧化温度的升高而呈指数型增加。RE-Ni-W-P-SiC复合镀层与Ni-W-P合金层相比,它的高温抗氧化性能可以提高2～3倍。镀层的截面形貌和X射线衍射图表明, RE-Ni-W-P-SiC复合镀层具有较好的抗高温氧化能力。
The high temperature oxidation resistance of RE-Ni-WP-SiC multi-functional composites was studied. The results show that pure nickel coating, Ni-WP, Ni-WP-SiC and RE-Ni-WP- The relationship between the oxide film quality and the oxidation time of the coating is a mixed curve, that is, the law of the combination of the straight line and the curve. When the oxidation time is less than 60min, the growth law of the oxide film is similar to that of the linear equation. When the oxidation time is longer than 60min, the growth law of the oxide film can be expressed by the power function equation. The order of the oxidation rates of the four coatings is Ni> Ni-W-P> Ni-W-P-SiC> RE-Ni-W-P-SiC. The oxide film quality of Ni-W-P, Ni-W-P-SiC and RE-Ni-W-P coatings increased exponentially with the increase of oxidation temperature. RE-Ni-W-P-SiC composite coating compared with the Ni-W-P alloy layer, its high temperature oxidation resistance can be increased by 2 to 3 times. The cross-sectional morphology and X-ray diffraction pattern of the coating show that the RE-Ni-W-P-SiC composite coating has good high temperature oxidation resistance.