Fabrication and Characterization of Composite Materials Made from Intermetallic Compounds and Zirconia Ceramics

金属间化合物， MoSi_2， WSi_2， TiC，TiB_2和TiN，可以确保视图点的兴趣，如高敏感点、优异的高温氧化抵抗力、硬度和良好的热导体。这些材料的主要困难是思想的固有缺陷，它限制了它们的应用。他们需要在秩序中重新强制执行，以提高他们的机械性能。在目前的研究中， ZrO_2已经被证明是这些金属化合物的一种非常有吸引力的强化材料。ZrO_2 （2mol%Y_2O_3）的密集型复合材料及其间金属化合物在1400至1500 μ之间的196兆帕下被热等静态压缩（HIPing）制造，在1400 μ至1500 μ之间的2小时内被评估为机械和电气性能。在另一方面，对陶瓷和金属化合物之间的分层材料的性能的制造和测量得到了很小的关注。根据目前结果，ZrO_2 （2 Y）/MX=（60/40）/（80/20）/（60/40）摩尔% （MX=MoSi_2， WSi_2）、（50/50）/（80/20）/（50/50） （MX=TiC）和（40/60）/（70/30）/（40/60） （MX=TiN）已准备好。在方向上，相对和平行的总的电气抵抗力是不相容的（<approximately equal>10^<11>OMEGA·cm）和行为性的（<approximately equal>10^&lt;-4&gt; OMEGA·cm），尊重。住宅压力约为150-200兆帕，接近界面。“破碎的烦恼对日常压力的影响很大。”

Intermetallic compounds, MoSi_2, WSi_2, TiC,TiB_2, and TiN,are considerable of interest from views points such as high melting points, excellent high-temperature oxidation resistance, hardness, and good heat conductor. The main difficulty with these materials is an inherent lack of thoughness, which limits their applications. They need to be reinforced in order to improve their mechanical properties. In the present study, ZrO_2 has been proved to be a very attractive reinforcement material for these intermetallic compounds. Dense sintered composites of ZrO_2 (2mol% Y_2O_3) and these intermetallic compounds have been fabricated by hot isostatic pressing (HIPing) for 2 h under 196 MPa at 1400ﾟ to 1500ﾟC.Their mechanical and electrical properties have been evaluated in connection with their compositions and microstructures. On the other hand, little attention has been paid to the fabrication and measurement of properties of laminated materials of composites between ceramics and intermetallic compounds. On the basis of the present results, dense laminated materials with the compositions of ZrO_2 (2Y)/MX=(60/40)/(80/20)/(60/40)mol% (MX=MoSi_2, WSi_2), (50/50)/(80/20)/(50/50) (MX=TiC), and (40/60)/(70/30)/(40/60) (MX=TiN) have been prepared by HIPing. Overall electric resistivities in directions perpendicular and parallel to the interfaces are insulative (<approximately equal>10^<11> OMEGA・cm) and conductive (<approximately equal>10^<-4> OMEGA・cm), respectively. Residual stresses of as much as 150-200 MPa are induced near the interfaces. The fracture toughnesses are greatly affected by the residual stresses.