W-Zr-C alloy with nanoscale ZrC particles dispersion was fabricated via powder metallurgy method using W, ZrH₂ and nanoscale C powders as starting materials. The average size of in-situ formed particles is 55 nm. The smaller particles in the grain interior are dominantly ZrC particles. Zr decomposed from ZrH₂ can also react with impurity oxygen to form ZrO₂ particles and reduce the detrimental effects of oxygen on grain boundaries. The as-swaged W-Zr-C alloy is ductile at 200 °C, and the ultimate tensile strength and total elongation (TE) at 300 °C are 643.5 MPa and 23.5%, respectively. After annealing at 1400 °C, the UTS at 300 °C of W-Zr-C alloy is still as high as 611.4 MPa and the TE is 33.2%. The recrystallization start temperature of the as-swaged W-Zr-C alloy is between 1400 and 1500 °C, which is 200 °C higher than that of pure W. The in-situ formation of nanoscale second-phase particles via the dissolution-precipitation mechanism provides a feasible strategy for improving the low-temperature toughness and high-temperature stability of tungsten alloys.

_{以W、ZrH 2}和纳米级C粉末为起始材料，采用粉末冶金法制备了具有纳米级ZrC颗粒分散体的W-Zr-C合金。原位形成的颗粒的平均尺寸为 55 nm。晶粒内部的较小颗粒主要是 ZrC 颗粒。ZrH ₂分解的Zr也能与杂质氧反应生成ZrO ₂颗粒并减少氧对晶界的不利影响。锻造的 W-Zr-C 合金在 200 °C 下具有延展性，在 300 °C 下的极限抗拉强度和总伸长率 (TE) 分别为 643.5 MPa 和 23.5%。W-Zr-C合金在1400℃退火后，300℃的UTS仍高达611.4 MPa，TE为33.2%。锻造的W-Zr-C合金的再结晶起始温度在1400～1500℃之间，比纯W高200℃。通过溶解原位形成纳米级第二相颗粒-析出机理为提高钨合金的低温韧性和高温稳定性提供了可行的策略。