ZrB2-based composites toughened by as-received and heat-treated short carbon fibers |
| |
| Affiliation: | 1. State Key Laboratory of Structural Analyses for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;2. Ceramic Materials Engineering, University of Bayreuth, D-95440 Bayreuth, Germany;1. School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, China;2. Research Center for Functional Materials (RCFM), National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan;3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, Donghua University, Shanghai 201620, China;4. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, China;1. State Key Laboratory of Structural Analyses for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;2. Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;3. Ceramic Materials Engineering, University of Bayreuth, D-95440 Bayreuth, Germany;1. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;2. Department of Engineering, Quchan Branch, Islamic Azad University, Quchan, Iran;3. Young Researchers and Elite Club, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran;4. School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran |
| |
| Abstract: | In order to improve the fracture toughness of ZrB2 ceramics, as-received and heat treated short carbon fiber reinforced ZrB2-based composites were fabricated by hot pressing. The toughening effects of the fibers were studied by investigating the relative density, phase composition, microstructure and mechanical properties of the composites. It was found that the densification behavior, microstructure and mechanical properties of the composites were influenced by the fibers’ surface condition. The heat treated fiber was more appropriate to toughen the ZrB2-based composites, due to the high graphitization degree, low surface activity and weak interfacial bonding. As a result, the fracture toughness of the composites with heat-treated fiber is 7.62 ± 0.12 MPa m1/2, which increased by 10% as compared to the composites with as-received fiber (6.89 ± 0.16 MPa m1/2). |
| |
| Keywords: | Ultra-high temperature ceramics Carbon fiber Fiber-toughened ceramics Fracture toughness |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
