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-x·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) bi-layered system, the features of the combustion wave change from bending toward the (3Ti-2BN-x) 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
参考文献
| [1] | Merzhanov A G. Int. J. of Self-Propagating High-Temperature Synthesis, 1997, 6 (2): 119-163. |
| [2] | Sata N, Sanada N, Hirano T, et al. Proc. of the First Int. Symp. on Combustion and Plasma Synthesis of High-Temperature materials. New York: VCH Publishers, Inc., 1990. 195-203. |
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