Microstructure and mechanical properties of reaction bonded B4C-SiC composites: The effect of polycarbosilane addition |
| |
| Affiliation: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. School of Material Science and Engineering, University of Jinan, Jinan 250022, China;2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China;3. Shandong Industrial Ceramics Research & Design Institute Co., Ltd, Zibo 255000, China;4. School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;5. Shandong Green Polymer Materials Co. Ltd., Tai''an 271600, China;1. Mechanical and Electrical Engineering Institute, Hebei University of Engineering, Handan 056038, China;2. Equipment Manufacturing College, Hebei University of Engineering, Handan 056038, China;3. The State Key Laboratory of Advanced Technology for Materials Synthe sis and Processing, Wuhan University of Technology, Wuhan 430070, China;1. Departamento de Ingeniería Mecánica, Energética y de los Materiales, Universidad de Extremadura, 06006 Badajoz, Spain;2. LiqTech International AS, Industriparken 22C, 2750 Ballerup, Denmark;3. Department of Energy Conversion and Storage, Technical University of Denmark, Risø Campus, Frederiksborgvej 399, DK-4000 Roskilde, Denmark;4. Instituto de Cerámica y Vidrio, Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;1. Armour Solutions, Trentham, Victoria 3458, Australia;2. Faculty of Engineering and Industrial Sciences, Swinburn University of Technology, Hawthorn, Victoria 3122, Australia;3. Defence Materials Technology Centre, Hawthorn, Victoria 3122, Australia |
| |
| Abstract: | Reaction bonded B4C-SiC composites were prepared by infiltrating silicon melt into porous B4C-SiC green preforms at 1500 °C in vacuum. The porous green preform was obtained from a mixture of polycarbosilane (PCS) and particle size graded B4C after pre-sintering at 1600 °C. For the first time, PCS was used to adjust the phase composition and microstructure of the reaction bonded boron carbide composites. It is indicated that the addition of PCS and its content has a significant influence on the microstructure as well as the mechanical properties of the subsequent reaction bonded B4C-SiC composites. For the B4C-SiC composite with 5 wt% PCS added, a flexural strength of 319±12 MPa, and an elastic modulus of 402±18 GPa can be achieved, which is 23% and 15% higher than those of the composite without PCS addition, respectively. While, with the higher content of PCS addition, the mechanical properties of the composites are decreased drastically due to the large amount of residual Si agglomeration in the composites. The reaction mechanisms as well as their microstructure evolution processes correlated with the mechanical properties of the reaction bonded B4C-SiC composites are further discussed in our work. |
| |
| Keywords: | B Composites C Mechanical properties and microstructure Reaction bonded Polycarbonsilane |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
