The fabrication of dense tungsten was attempted with the combination process of presintering by spark plasma sintering and final hot isostatic pressing. The specimens fabricated by spark plasma sintering (1500–1600 °C) of commercial powder exhibited a relative density above 90.4%. In the case of the post hot isostatic pressing at 1650 °C for 2 h, improved relative density in the range of 96.4% to 97.2% was obtained. X-ray diffractometry and X-ray photoelectron spectroscopy analysis indicated that the sintered specimen was composed mainly of tungsten, and the trace amounts of metallic tungsten are bound with oxygen due to the surface oxidation. Strength measurement was conducted by biaxial bending test using a piston-on-three balls. Maximum flexural strength of 761 MPa were obtained for tungsten consolidated by a combined process of spark plasma sintering and hot isostatic pressing. The strength increase is explained by the increase in relative density rather than the effect of particle size.

尝试通过放电等离子烧结预烧结和最终热等静压的组合工艺制备致密钨。通过放电等离子烧结（1500-1600°C）商业粉末制造的样品表现出高于 90.4% 的相对密度。在 1650 °C 下热等静压后 2 h 的情况下，获得了 96.4% 至 97.2% 范围内的改进相对密度。X射线衍射和X射线光电子能谱分析表明，烧结试样主要由钨组成，微量金属钨由于表面氧化与氧结合。强度测量是通过双轴弯曲试验使用活塞对三个球进行的。通过放电等离子烧结和热等静压的组合工艺固结的钨获得了 761 MPa 的最大弯曲强度。强度增加是由相对密度的增加而不是粒径的影响来解释的。