Advanced Alumina Composites Reinforced with Titanium‐Based Alloys
Advanced Alumina Composites Reinforced with Titanium‐Based Alloys
复制标题
DOI：
10.1111/j.1151-2916.2001.tb00869.x
复制
发表时间：
2004-12
影响因子：
3.9
通讯作者：
R. Günther;T. Klassen;B. Dickau;F. Gärtner;A. Bartels;R. Bormann
中科院分区：
文献类型：
--
作者：
R. Günther;T. Klassen;B. Dickau;F. Gärtner;A. Bartels;R. Bormann
通过高能球磨制备用于高温结构和功能应用的新型（间）金属陶瓷复合材料。在无压烧结压实过程中，形成致密的 Al2O3/Ti 基合金复合材料，该复合材料由陶瓷和（间）金属相的互连网络组成。 Ti-Al-V/Al2O3 和 Ti-Al-Nb/Al2O3 复合材料比整体 Al2O3 具有更高的损伤容限，即断裂韧性高达 5.6 MPa·m0.5，弯曲强度高达 527 MPa。相对于整体式 Al2O3 陶瓷，其抗磨粒磨损性能几乎提高了一倍。电阻率与陶瓷体积分数成正比，范围在 0.3 mΩ·cm 和 55.1 mΩ·cm 之间，仅具有微弱的温度依赖性（≤700°C）。
New (inter)metallic-ceramic composites for high-temperature structural and functional applications are prepared via high-energy ball milling. During compaction by pressureless sintering, dense Al2O3/Ti-based alloy composites are formed that consist of inter-connected networks of the ceramic and the (inter)metallic phases. Ti-Al-V/Al2O3 and Ti-Al-Nb/Al2O3 composites show enhanced damage tolerance over monolithic Al2O3, i.e., fracture toughnesses up to 5.6 MPa·m0.5 and bending strengths up to 527 MPa. The resistance against abrasive wear is almost doubled with respect to monolithic Al2O3 ceramic. Electrical resistivity scales with the ceramic volume fraction and ranges between 0.3 mΩ·cm and 55.1 mΩ·cm, with only a weak temperature dependence ≤700°C.