【摘要】 弥散强化铜合金（ODS-Cu）具有较好的高温强度与抗辐照性能，为聚变堆偏滤器热沉积候选材料之一。针对传统粉末冶金工艺工序复杂、纳米颗粒易团聚及难以制备大尺寸构件等问题，采用钨极惰性气体保护电弧增材（TIG-AM）技术，通过Y₂O₃含量（质量分数，下同）调控，实现Y₂O₃的原位反应合成与构件的一体化制备。结果表明，当Y₂O₃含量为0.4%时，获得等轴晶（平均尺寸为15.2μm）与纳米Y₂O₃颗粒的协同强化结构，硬度（HV）达140，与Glidcop合金相当；当Y₂O₃含量>0.4%时，颗粒团聚（>200 nm）导致硬度下降了10%～15%。更多还原

【Abstract】 Dispersion strengthened copper alloy（ODS-Cu） exhibits desirable high temperature strength and radiation resistance, which is one of candidate materials for thermal deposition of divertor in fusion reactor. Aiming at the complicated process, nanoparticle agglomeration and difficulty in preparing large-scale components during traditional powder metallurgy process, tungsten inert gas arc additive manufacture（TIG-AM） technology was employed to achieve insitu reaction synthesis of Y₂O₃ and integrated preparation of components through Y₂O₃ content regulation. The results indicate that the co-strengthened structure of equiaxial crystal（average size of 15.2 μm） and nano Y₂O₃ particles are obtained with 0.4% Y₂O₃, and the hardness reaches 140 HV, which is comparable to Glidcop alloy. However, particle agglomeration（>200 nm） leads to a decline of 10%～15% in hardness with Y₂O₃ content exceeding 0.4%.更多还原