本发明公开了一种抗高温烧蚀喉衬用高熵合金及其制备方法,所述喉衬用高熵合金材料的表达式为：W-aMo-bTa-cX-d,15％≤a≤50％,15％≤b≤50％,15％≤c≤50％,0％＜d≤50％,且a+b+c+d＝100％。其中W、Mo、Ta和X元素氧化物的熔点比较高,因此其氧化物的挥发焓也比较高,在烧蚀过程中,其氧化物的挥发会带走大量的热,降低了喉衬用高熵合金表面的驻点温度,提高了抗烧蚀性能,抵抗了高温下焰流的冲刷作用。所述喉衬用高熵合金具有优异的高温强度和稳定性,高温长时烧蚀后的线烧蚀率极小,接近于零烧蚀,有利于提升火箭发动机的控制精准度和效率。

The invention discloses a high entropy alloy for throat lining resistant to high temperature ablation and a preparation method thereof. The expression of the high entropy alloy material for throat lining is W-aMo-bTa-cX-d, 15% ≤a≤ 50%, 15% ≤b≤ 50%, 15% ≤c≤ 50%, 0% < d≤ 50%, and a+b+c+d = 100%. Among them, the melting point of W, Mo, Ta and X element oxides is relatively high, so the volatilization enthalpy of their oxides is also relatively high. During the ablation process, the volatilization of their oxides will take away a lot of heat, reduce the stagnation point temperature of the throat lining high-entropy alloy surface, improve the ablative performance, and resist the erosion effect of the flame flow at high temperatures. The high entropy alloy used for throat lining has excellent high temperature strength and stability, and the line ablation rate after high temperature long-term ablation is very small and close to zero ablation, which is conducive to improving the control accuracy and efficiency of the rocket engine.