-
摘要: 结合高能球磨和高温高压实验技术,制备了块体TiN/TiB2纳米复合材料。通过X射线衍射和拉曼光谱对材料的微观结构进行了研究。结果表明,采用金属Ti和六方BN为原料,在球磨过程和高温高压实验过程中,TiN先于TiB2形成,球磨70 h后有少量的纳米晶TiN开始形成。在高温高压实验中,在样品腔的合成温度低于1 300 ℃时,没有TiB2出现;当温度达到1 300 ℃后,合成出了TiN和TiB2的复合材料。对所合成的块状材料的热膨胀性和导电性能进行了测试。Abstract: Planetary milling and subsequent high-pressure high temperature treatment fabricated TiN/TiB2 composite materials. The structure developments of the materials were monitored by X-Ray diffraction and Raman spectrum. The mechanisms of ball milling and high-pressure high temperature treatment were researched in detail. It was found that the diffraction peaks of -TiNx appeared after milling 50 h. No self-propagating high temperature synthesis (SHS) reaction was found during the whole milling process. The sample that milled for 70 h was transformed into TiN/TiB2 composite materials after subsequent high-pressure high temperature treatment (5 GPa and 1 300 ℃).
-
Key words:
- mechanical alloying /
- high temperature and high-pressure /
- TiN /
- TiB2 /
- composite materials
-
Huang J L, Chen C Y, Lee M T. Microstructure, Chemical Aspects, and Mechanical Properties of TiB2/Si3N4 and TiN/Si3N4 Composites [J]. J Mater Res, 1994, 9: 2349-2354. Davies T J, Ogwu A A. Characterisation of Composite of TiC+TiB2 Bonded with Nickel Based Binder Alloy: Mechanical and Microstructural Properties [J]. Powder Metall, 1995, 38: 39-44. Spengler W, Kaiser R. First and Second Order Raman Scattering in Transition Metal Compounds [J]. Solid State Commun, 1976, 18: 881-884. Spengler W, Kaiser R, Christensen A N, et al. Raman Scattering, Superconductivity, and Phonon Density of States of Stoichiometric and Nonstoichiometric TiN [J]. Phys Rev B, 1978, 17: 1095-1101. Spengler W, Kaiser R, Bilz H. Resonant Raman Scattering in a Superconducting Transition Metal Compound-TiN [J]. Solid State Commun, 1975, 17: 19-22. Li J L, Hu K, Zhou Y. Formation of TiB2/TiN Nanocomposite Powder by High Energy Ball Milling and Subsequent Heat Treatment [J]. Materials Science and Engineering A, 2002, 326: 270-275. Yao B, Liu S E, Liu L, et al. Mechanism of Mechanical Crystallization of Amorphous Fe-Mo-Si-B alloy [J]. J Appl Phys, 2001, 90: 1650-1654. Ding Z H, Yao B, Qiu L X, et al. Formation of Titanium Nitride by Mechanical Milling and Isothermal Annealing of Titanium and Boron Nitride [J]. J Alloy Compd, 2005, 391: 77-81. Chin Z -H, Perng T -P. In Situ Observation of Combustion to Form TiN during ball Milling Ti in Nitrogen [J]. Appl Phys Lett, 1997, 70(18): 2380-2382.
点击查看大图
计量
- 文章访问数: 7563
- HTML全文浏览量: 568
- PDF下载量: 879