(Ti-2B-60wt%Cu)/(3Ti-2BN-x·Cu)层状材料燃烧合成研究

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．

Combustion Wave Propagation during SHS of Bi-Layered System (Ti-2B-60wt%Cu)/(3Ti-2BN-x)

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.