TiB<sub>2</sub>-Cu 体系的自蔓延高温合成及致密化

TiB₂-Cu 体系的自蔓延高温合成及致密化

基金项目: 国家杰出青年基金(59925207); 甘肃省有色金属新材料重点实验室开放基础资助项目(2003032); 武汉理工大学材料复合新技术国家重点实验室开放基金(2003XJJ197)

1.
National Key Laboratory of Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621000, China;
2.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

摘要: TiB₂-Cu 系复合材料具有高强度、高导电性, 但TiB₂-Cu 体系由于润湿性较差, 制备密实TiB₂-Cu 系复合材料非常困难。本文中采用自蔓延高温燃烧合成技术研究了材料体系对合成过程中产物的特性(温度、燃烧速度及产物等) 的影响, 在此基础上采用自主开发的SHS/ QP 技术制备了致密的TiB₂-Cu 块材, 并研究了金属添加剂的影响。研究结果表明, 在体系中添加一定的金属钼或铁, 明显改善了体系的润湿性: 钼或铁的加入使产物中金属分布更加均匀, 大大降低了产物孔隙率。同时钼的加入还明显降低了晶粒尺寸。
- TiB₂-Cu /
- 复合材料 /
- 燃烧合成
Abstract: TiB₂-Cu composite is higH₂elect ric composite with high-intensity , but the preparation of dense TiB₂-Cucomposite is quite difficult because of the bad wettability of TiB₂-Cu. The influence of different materials systems onthe characteristics (temperature , speed of combustion , production , etc. ) of the production by SHS (Self-propagating High-temperature Synthesis) was investigated. Based on these , the SHS/ QP technique was developed and usedfor the preparation of dense TiB₂-Cu composite. The additives of Mo and Fe improve the wettability , make theproduct s more uniform and decrease the pore ratio and the particle size.
- TiB₂-Cu /
- composites /
- self-propagating high-temperature synthesis