Effect of Al content on impact resistance behavior of Al-Ti-B4C composite fabricated under air atmosphere |
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| Institution: | 1. Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Engineering Research Center of Failure Analysis and Safety Assessment, Jinan 250014, China;2. Qilu University of Technology (Shandong Academy of Sciences), Advanced Materials Institute, Shandong Key Laboratory for High Strength Lightweight Metallic Materials, Jinan 250014, China;3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;4. Lille University, Civil Engineering and geo-Environmental Laboratory (ULR 4515 LGCgE), Lille 59000, France |
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| Abstract: | Reaction behavior, mechanical property and impact resistance of TiC-TiB2/Al composite reacted from Al-Ti-B4C system with various Al content via combination method of combustion synthesis and hot pressed sintering under air was investigated. Al content was the key point to the variation of mechanical property and impact resistance. Increasing Al content could increase the density, strength and toughness of the composite. Due to exorbitant ceramic content, 10 wt.% and 20 wt.% Al-Ti-B4C composites exhibited poor molding ability and machinability. Flexural strength, fracture toughness, compressive strength and impact toughness of 30–50 wt.% Al-Ti-B4C composite were higher than those of Al matrix. The intergranular fracture dispersed and defused impact load and restricted crack extension, enhancing the impact resistance of the composite. The composite with 50 wt.% Al content owned highest mechanical properties and impact resistance. The results were useful for the application of TiC-TiB2/Al composite in impact resistance field of ceramic reinforced Al matrix composite. |
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| Keywords: | Ceramic Al matrix composite Impact resistance Mechanical properties |
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