Fabrication and mechanical properties of Al2O3/Ti(C0.7N0.3) nanocomposites |
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| Affiliation: | 1. Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061, China;2. School of Mechanical and Manufacturing Engineering, The University of New South Wales, NSW2052, Australia;3. School of Materials Science and Engineering, Jinan University, Jinan 250022, China;1. Osaka Municipal Technical Research Institute, 1-6-50 Morinomiya Joto-ku, Osaka 536-8553, Japan;2. Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka Ibaraki, Osaka 567-0047, Japan;1. Moscow State Technological University STANKIN, Vadkovsky per. 1, Moscow 127994, Russia;2. IDTI RAS, Vadkovsky per. 18-1A, Moscow 127055, Russia;3. National University of Science and Technology “MISIS” Leninsky Prospect 4, Moscow 119049, Russia;1. Department of Production Engineering, National Institute of Technology, Agartala, India;2. Department of Production Engineering, National Institute of Technology, Agartala, India;3. Department of ProductionEngineering, National Institute of Technology, Agartala, India;1. Indian Institute of Technology Bombay-Monash Research Academy, Mumbai, India;2. Indian Institute of Technology Bombay, Mumbai, India;3. Monash University, Clayton, VIC 3800, Australia;1. Raytheon Chair for Systems Engineering (RCSE Chair), Advanced Manufacturing Institute, King Saud University, Riyadh, Saudi Arabia;2. Industrial Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia |
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| Abstract: | Two kinds of Al2O3/Ti(C0.7N0.3) nanocomposites were fabricated with traditional hot pressed sintering and repetitious-hot-pressing technology, one is added with nano-scale SiC, and the other is without SiC. The results showed that the mechanical properties of the former are higher than that of the latter, especially the fracture toughness can reach up to 8.3 MPa m1/2. Although the fracture toughness remains high, repetitious-hot-pressing results in the reduction of flexural strength. The improvement of the mechanical properties is interpreted from the different microstructure and fracture mode. The microstructure shows that the addition of nano-scale Ti(C0.7N0.3) and nano-scale SiC lead to the refinement of matrix grain, and the inter/intragranular microstructure can be formed instead of the intergranular microstructure in monolithic alumina. The higher fracture toughness resulted mainly from the transgranular fracture mode. |
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