【摘 要】
：
An attractive way to prepare W/TaC based cermet at a relatively low temperature was proposed and confirmed experimentally. The thermodynamics calculations indicated that the reaction between WC and Ta2O5 was feasible at as low a temperature as 1400 ℃. The
【机 构】
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Department of Basics, Air Force Engineering University, Xi’an 710051, China;Science and Technology o
【出 处】
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武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
An attractive way to prepare W/TaC based cermet at a relatively low temperature was proposed and confirmed experimentally. The thermodynamics calculations indicated that the reaction between WC and Ta2O5 was feasible at as low a temperature as 1400 ℃. The experimental results showed that W/TaC cermet could be fabricated by in-situ reaction sintering process at 1400 ℃ for 2 h in vacuum. The open porosity and bulk density of the W/TaC cermet were 15.3％ and 13.4 g/cm3. Further, the microstructural features revealed that W, TaC, and Ta2WO8 were identified to be the main constituents of the W/TaC cermet. The mass lose rate and linear recession rate of the W/TaC cermet during an oxyacetylene torch test were 0.0048 g/s and 0.0233 mm/s, respectively. The high porosity, the presence of Ta2WO8 phases within W/TaC and evaporation of WO3 on the surface of the composite contributed to the decrease of ablative property when comparing with pure W.
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