Microstructure and mechanical properties of B6O-B4C sintered composites prepared under high pressure
Microstructure and mechanical properties of B6O-B4C sintered composites prepared under high pressure
复制标题
高压制备B6O-B4C烧结复合材料的显微组织和力学性能
DOI：
10.1023/a:1004753116816
复制
发表时间：
2000
影响因子：
4.5
通讯作者：
H. Iwahara
中科院分区：
文献类型：
--
作者：
H. Itoh;I. Maekawa;H. Iwahara
在高压和高温条件下（3- 5GPa，1500-1800°C），由实验室合成的B6 O粉末和商业上可获得的B4 C粉末的混合物制备B6 O-xB 4C（x = 0- 40vol%）系统中的烧结复合材料。研究了烧结条件和B_4C添加量对烧结复合材料形成相、显微组织和力学性能的影响。烧结复合材料的显微硬度随着处理温度的升高而增加，而断裂韧性略有下降。在4GPa、1700°C、20 min的烧结条件下，B6 O-30vol%B4C烧结复合材料的显微硬度达到最大值Hv ≥ 46 GPa。
Sintered composites in the B6O-xB4C (x = 0–40 vol%) system were prepared under high pressure and high temperature conditions (3–5 GPa, 1500–1800°C) from the mixture of in-laboratory synthesized B6O powder and commercially available B4C powder. Relationship among the formed phases, microstructures and mechanical properties of the sintered composites was investigated as a function of sintering conditions and added B4C content. Microhardness of the sintered composite was found to increase with treatment temperature up to 1800°C, while fracture toughness decreased slightly. Maximum microhardness of Hv ∼ 46 GPa was obtained from B6O-30vol%B4C sintered composite under the sintering conditions of 4 GPa, 1700°C and 20 min.