凝胶注模法制备复杂形状钨铜复合材料

发布时间：2018-05-16 00:45

  本文选题：钨铜复合材料 + 坯体　； 参考：《稀有金属与硬质合金》2017年04期

【摘要】：利用非水基体系凝胶注模法制备了复杂形状钨铜复合材料坯体。研究了分散剂含量以及固相含量对钨铜浆料黏度的影响,绘制了坯体的室温干燥曲线并制订了干燥制度,同时对坯体微观形貌、抗弯强度等进行了表征和测试。结果表明:分散剂添加量为0.15%(质量分数,基于金属粉末质量)时浆料黏度达到最低,在此基础上浆料的固相含量可达到45%(体积分数),满足凝胶注模的要求;坯体先在室温下干燥10h后放入100℃的恒温干燥箱中干燥8h,可得到表面无变形、无开裂的钨铜坯体;随着固相含量的增大,坯体致密性和均匀性均随之提高;坯体表面质量较好,抗弯强度可达到26.9 MPa。
[Abstract]:The complex shape tungsten-copper composite billets were prepared by non-aqueous system gel injection. The effects of dispersant content and solid content on the viscosity of tungsten copper paste were studied. The drying curve at room temperature was drawn and the drying system was worked out. Meanwhile, the microstructure and bending strength of the billet were characterized and tested. The results showed that the viscosity of the slurry reached the lowest when the amount of dispersant was 0.15 (mass fraction, based on the mass of metal powder), and the solid content of the slurry could reach 45% (volume fraction), which met the requirement of gel injection. After drying at room temperature for 10 h and then drying in a 100 鈩，

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