5Si3、SiOx（x=1，1.5，2）以及 ZrOx（x=1，1.5，2）相。W5Si3為連續(xù)分布相，SiOx和ZrOx顆粒均勻分布在基體中，尺寸分別為1.0~2.5 μm和0.7~2.7 μm，且ZrOx顆粒常與SiOx顆粒共生。W5Si3對(duì)合金的抗氧化性能起到關(guān)鍵作用，添加Zr有助于W5Si3相的形成，其相面積達(dá)到了70.2%。在1000 ℃大氣環(huán)境中W-Si-Zr合金的氧化速率約為W-Si合金的1/2，純W的1/36。;Self-passivating W-Si-Zr alloys were prepared by mechanical alloying and spark plasma sintering. Microstructures of alloys were characterized by XRD, XPS, SEM and EPMA, and their oxidation resistance was tested. The results show that the alloy contains W-enriched, W5Si3, SiOx (x=1, 1.5, 2) and ZrOx (x=1, 1.5, 2) phases. The W5Si3 phase distributes continuously. SiOx and ZrOx particles are dispersed in the matrix with the sizes of 1.0–2.5 μm and 0.7–2.7 μm, respectively, and ZrOx particles are often associated with SiOx particles. The W5Si3 plays a key role in the oxidation resistance of the alloy. The addition of Zr contributes to the formation of W5Si3 phase, whose area reaches 70.2%. The oxidation rate of W-Si-Zr alloy is about 1/2 of that of W-Si alloy and 1/36 of that of pure W at 1000 ℃ in the air."/>