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无机材料学报

无机材料学报

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

曹文斌1; 沈卫平1; 葛昌纯1; Grigoryan E H2; Sytschev A E2; Rogachev A S2   

  1. 1.北京科技大学特种陶瓷研究室, 北京 100083; 2. 俄罗斯科学院结构宏观动力学与材料科学研究所, 切尔洛戈洛夫卡, 莫斯科 142432
  • 收稿日期:1999-08-26 修回日期:1999-10-06 出版日期:2000-08-20 网络出版日期:2000-08-20

Ti-2B-60wt%Cu)/(3Ti-2BN-x.Cu)

CAO Wen-Bin1; SHEN Wei-Ping1; GE Chang-Chun1; Grigoryan E H2; Sytschev A E2; Rogachev A S2   

  1. 1. Laboratory of Special Ceramics & Powder Metallurgy （LSCPM）; University of Science and Technology Beijing; Beijing 100083; China; 2. Institute of Structural Macrokinetics and Material Science (ISMAN), Russian Academy of Sciences, Chernogolovka, Moscow 142432, Russia
  • Received:1999-08-26 Revised:1999-10-06 Published:2000-08-20 Online:2000-08-20

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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．

关键词: 自蔓延高温合成, 层状材料, 燃烧波

Abstract: 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.

Key words: combustion synthesis, bi-layered materials, combustion wave

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