以工业级钨粉、镍粉和铁粉为原料,采用凝胶注模成型技术制备90W-Ni-Fe合金.研究了分散剂含量和固相体积分数对金属浆料黏度的影响,并对素坯的抗弯强度以及脱脂、烧结进行了分析.结果表明,90W-Ni-Fe金属浆料的黏度随着分散剂添加量的增加先降低后升高,随着固相体积分数的增加而增高.坯体抗弯强度随着单体交联剂比例的增大呈现出先升高后降低的趋势,固相体积分数为45％时坯体的抗弯强度最高.素坯脱脂后在1445 ℃烧结1.5h,获得了密度为16.93g/cm3的烧结体,其致密度高达98.72％.%The 90W-Ni-Fe alloy was fabricated by the aqueous gelcasting using the commercial grade tungsten powder,nickel powder and iron power.The viscosity of metal slurry with the different dispersant contents and solid loadings were studied,the bending strength of the green body and its debinding and sintering process were also analyzed.The results showed that the viscosity of the 90W-Ni-Fe metal slurry decreased and then increased with the increase of dispersant content,and increased with the increase of solid loading.With increasing the proportion of monomer and crosslinker,the bending strength decreased firstly and then increased,and reached the highest value when the volume fraction of solid loading was 45％.After debinding and sintering at 1445 ℃ for 1.5 h,the density of sintered product was 16.93 g/cm3,and its relative density was up to 98.72％.
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