【摘要】 采用放电等离子烧结技术制备不同W添加量的Ti-W复合材料，并对其物相组成、显微形貌、力学性能以及断口形貌进行了研究。结果表明：W元素可以细化复合粉体颗粒尺寸，促进界面结合。添加5at%W的Ti-W复合材料的致密度由纯Ti的92.33%提升至98.49%，硬度由HV_0.5 315提升至HV_0.5 740。Ti-W复合材料的抗压强度也得到显著提升，其中添加25at%W的Ti-25W的抗压屈服强度高达2267 MPa。当W含量小于20at%时，片层状α/β-Ti相与沉淀析出的纳米马氏体起主要强化作用；当W含量为25at%时，未固溶的W颗粒与富W相固溶体起到了颗粒强化与固溶强化作用。更多还原

【Abstract】 Ti-W composites with different W additions were prepared by spark plasma sintering technique and their phase composition,microscopic morphology, mechanical property, and fracture morphology were investigated. The results show that W element can refine the particle size of composite powder and promote the interfacial bonding. The relative density of Ti-W composite with 5at% W addition content increases from 92.33%（pure Ti） to 98.49%, the microhardness increases from HV_0.5 315 to HV_0.5 740. The compressive strength of Ti-W composites is also significantly improved, and the compressive yield strength of Ti-W composite with 25at% W addition content（Ti-25W） is as high as 2267 MPa. When the W content is lower than 20at%, the lamellar α/β-Ti phase and precipitated nano-martensite play a major role in strengthening; when the W content is 25at%, the unsolidified W particles and W-rich solid solution play a role in particle strengthening and solid solution strengthening.更多还原