TiC和ZrC颗粒增强钨基复合材料的烧蚀研究  

Ablation of Tungsten Matrix Composites Reinforced by TiC and ZrC Particles

作　　者：宋桂明[1] 孟庆昌[1] 王玉金[1] 周玉[1] 

机构地区：[1]哈尔滨工业大学材料学院,哈尔滨150001

出　　处：《固体火箭技术》2001年第2期48-53,共6页Journal of Solid Rocket Technology

摘　　要：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 ZrThe ablation properties of tungsten matrix composites reinforced by TiC and ZrC particles (two series of TiC p/W and ZrC p/W) were measured with an oxyacetylene ablation equipment.Results revealed that the values of the mass ablation rate and linear ablation rate were in the order:W>30TiC p/W>40TiC p/W>30ZrC p/W>40ZrC p/W(30TiC p/W stands for 30% vol. content of TiC particle,the same below).The ablation surface temperature and back surface temperature of samples were successfully detected on line by using a dynamic responding multiwavelength calorimetric pyrometer and a thermal couple,respectively.30TiC p/W and 40TiC p/W failed to withstand the thermal shock of 2000℃/s during the initial stage of firing.In constrast,30ZrC p/W and 40ZrC p/W withstood the thermal shock.The ablation resistance of the composites are greatly increased with addition of TiC and ZrC particles.The more is carbides content,the better is the ablation resistance.Thermal chermochemical oxidation of W,TiC and ZrC is the main ablation mechanism of the composites.

关 键 词：钨基复合材料 烧蚀性能 氧化烧蚀 碳化钛 碳化锆 

分 类 号：TB331[一般工业技术—材料科学与工程]