摘要
研究了当燃烧波蔓延通过(Ti-2B-60wt%Cu)/(3Ti-2BN-x·Cu)(x=0、10、20、 40wt%)两层混合粉料时,稀释剂Cu含量和生坯压制压力p的变化对燃烧波形态和传播速度的 影响.经实验测定,当p=60MPa时;燃烧波在(3Ti-2BN)、(3Ti-2BN-10wt%Cu)、(3Ti-2BN- 20wt%Cu)、(Ti-2B-60wt%Cu)单层混合物中的传播速度分别为4.96mm/s、4.43mm/s、 2.17mm/s、 18.52mm/s,燃烧波不能蔓延通过(3Ti-2BN-40wt%Cu)单层混合物。对于(Ti- 2B-60wt%Cu)/(3Ti-2BN-x·Cu)层状混合物,从一端点火以后,燃烧波形态随(3Ti-2BN-x·Cu) 层金属含量的增加由弯向(3Ti-2BN-U·Cu)层的弧形改变为切向该层的楔形.此外,还研究了 生坯压制压力p=12、 24、 84、 108MPa时,不同生坯密度对燃烧波形态和传播速度的影响 规律.
The effects of Cu content and density of powder compacts on the features and velocity of the combustion wave during its propagation through the bi-layered powder compacts of (Ti-2B-60wt%Cu)/(3Ti-2BN-xCu) (x=0, 10, 20, 40wt%) were investigated. The combustion wave velocity for specimen (3Ti-2BN), (3Ti-2BN-10wt%Cu), (3Ti-2BN-20wt%Cu) and (Ti- 2B-60wt%Cu) compacted with pressure p=60MPa is 4.96, 4.43, 2.17 and 18.52mm/s respectively. While, combustion wave cannot propagate through the specimen of (3Ti-2BN-40wt%Cu). In (Ti-2B-60wt%Cu)/(3Ti-2BN-x.Cu) bi-layered system, the features of the combustion wave change from bending toward the (3Ti-2BN-x.Cu) layer to cutting as wedge-shape to this layer as the x increased. Besides, the effects of green densities of specimens compacted with p=12, 24, 84, 108MPa on the feature and combustion wave velocity were investigated.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第4期665-672,共8页
Journal of Inorganic Materials
基金
国家自然科学基金资助项目!(59672032
59811120918)