2-SiC復(fù)合材料，研究了燒結(jié)過(guò)程中復(fù)合材料的致密化行為，分析了添加W對(duì)復(fù)合材料微觀組織演化、相組成、力學(xué)性能和氧化行為的影響。結(jié)果表明：W的添加使復(fù)合材料的微觀組織表現(xiàn)出核殼結(jié)構(gòu)，以ZrB2晶粒為核，原位形成的(Zr, W)B2固溶體為殼，有效地促進(jìn)了復(fù)合材料的致密化和晶粒細(xì)化。對(duì)比不含W的復(fù)合材料，含W復(fù)合材料的維氏硬度、抗彎曲強(qiáng)度和斷裂韌性顯著提高，W添加含量在3%時(shí)力學(xué)性能最優(yōu)，復(fù)合材料表現(xiàn)出最佳的硬度、強(qiáng)度和韌性。隨著W添加量從0%增加到5%，復(fù)合材料的氧化增重和氧化層厚度逐漸減小。當(dāng)W添加量為5%時(shí)，復(fù)合材料的SiC貧化層消失。最后，詳細(xì)說(shuō)明了W的添加對(duì)復(fù)合材料性能的影響機(jī)制。;The ZrB2-SiC composites with refractory metal W of different contents (1vol%, 3vol%, and 5vol%) were prepared by spark plasma sintering. The densification behavior of composites during sintering process was investigated. The influence of W additions on the microstructure evolution, phase composition, mechanical properties, and oxidation behavior of W-doped composites was studied. Results show that the W addition leads to the formation of core-shell structures in the composites, where the ZrB2 grains are considered as the core and the in-situ formed (Zr, W)B2 solid solution is considered as the shell, thereby effectively promoting the grain refinement and composite densification. Compared with those of the W-free composites, the Vickers hardness, flexural strength, and fracture toughness of W-doped composites are enhanced. The optimal mechanical properties can be achieved at W addition content of 3vol%: the highest hardness, strength, and toughness can be obtained for the composites. The mass gain and oxide scale thickness of composites are gradually decreased with increasing the W addition from 0vol% to 5vol%. When the W addition in composite is 5vol%, the SiC-depleted layer disappears. Finally, the influence mechanism of W addition on the performance of composites is discussed."/>
2-SiC復(fù)合材料;致密化;微觀組織;力學(xué)性能;氧化行為;ZrB2-SiC composite;densification;microstructure;mechanical properties;oxidation behavior"/>