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用氧乙炔焰喷吹法对 Ti C和 Zr C增强钨基复合材料 ( Ti Cp/W和 Zr Cp/W两系列 )烧蚀性能进行了研究。结果表明 ,复合材料的质量烧蚀率和线烧蚀率由高到低的排列顺序为 :W>30 Ti Cp/W>4 0 Ti Cp/W>30 Zr Cp/W>4 0 Zr Cp/W( 30 Ti Cp/W表示含 Ti Cp 的体积分数为 30 % ,下同 )。对复合材料在烧蚀初期剧烈的升温过程进行了在线监测。 30 Ti Cp/W和 4 0 Ti Cp/W在烧蚀初期剧烈的升温过程中未能经受住约 2 0 0 0℃ /s升温热震而开裂 ,而 30 Zr Cp/W和 4 0 Zr Cp 能经受约 2 0 0 0℃ /s升温热震。在钨中加入 Ti C和 Zr C颗粒能明显提高钨的抗烧蚀性能 ,而且 Zr C颗粒比 Ti C颗粒更能提高 W的抗烧蚀性能。碳化物含量越高 ,材料的抗烧蚀性能越好。复合材料烧蚀机理是 W、Ti C和 Zr C的氧化烧蚀
The ablation properties of TiC and ZrC reinforced tungsten matrix composites (Ti Cp / W and Zr Cp / W series) were studied by oxyacetylene flame injection. The results show that the order of mass ablation rate and ablation rate of the composites from high to low is as follows: W> 30 Ti Cp / W> 4 0 Ti Cp / W> 30 Zr Cp / W> 4 0 Zr Cp / W (30 Ti Cp / W represents the volume fraction of Ti-containing Cp is 30%, the same below). The on-line monitoring of the composite material during the early stage of ablation was carried out. 30 Ti Cp / W and 40 TiCp / W failed to withstand thermal shocks of about 2000 ° C / s in the early stage of intense ablation, while 30 Zr Cp / W and 40 ZrCr Can withstand about 200 ° C / s thermal shock. The addition of Ti C and Zr C particles to tungsten can significantly improve the ablation resistance of tungsten, and the Zr C particles improve the ablation resistance of W more than Ti C particles. The higher the carbide content, the better the ablation resistance of the material. The ablation mechanism of composites is the oxidative ablation of W, Ti C and Zr C