Fe–B–C composites produced using spark plasma sintering |
| |
| Affiliation: | 1. Dpto. Física de la Materia Condensada-ICMS, Universidad de Sevilla-CSIC, Sevilla, Spain;2. Ohio Aerospace Institute, Cleveland, OH, USA;1. Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan;2. Department of Materials Science and Engineering, I-Shou University, Kaohsiung City 84001, Taiwan;1. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No. 5625 Renmin Street, Changchun 130022, Jilin, China;2. University of Chinese Academy of Sciences, Beijing 100049, China |
| |
| Abstract: | Fe–B–C composites were produced using iron and boron carbide powders. The powders were mixed to produce various compositions, ranging from 1 vol.% Fe to 80.1 vol.% Fe. Spark plasma sintering (SPS) was used to densify the composite powder green compacts. The sintering temperatures used ranged from 900 °C for the composites with a high iron content to 2000 °C for those with a high boron carbide content. It was evident that during the sintering process the iron reacted with the boron carbide. XRD analysis showed the presence of FeB, Fe2B, Fe3C, Fe3(B0.6C0.4), Fe23(B,C)6 and residual carbon as reaction products. The composites were found to have hardness values between 9.8 and 33.1 GPa with the higher hardness being associated with the higher boron carbide contents. The fracture toughness values determined were in the range of 2.8–5.3 MPa m0.5. With increasing iron content from 1 to 5 vol.%, it is evident that the FeB formed begins to embrittle the material rather than increase the fracture toughness as a result of the high residual stresses between the B4C and FeB phases. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
