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Effects of heat treatment on phase contents and mechanical properties of infiltrated B_4C/2024Al composites 被引量:4

热处理对无压浸渗法制备B_4C/2024Al复合材料相组成及力学性能的影响(英文)
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摘要 The B4C/2024Al composites were successfully produced by pressureless infiltration method, and the effects of heat treatment on phase content and mechanical properties were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and mechanical properties testing. The results show that phases of BnC/2024Al composites include B4C, Al, Al3BC, AlB2 and Al2Cu. The phase species remain unchanged; however, the phase content of the composites changes significantly after heat treatment at the temperature of 660, 700, 800 or 900 ℃ for 12, 24 or 36 h. It is found that the heat treatment results in not only considerable enhancement in hardness, but also reduction in bending strength of the composites. Heat treatment at 800 ℃ for 36 h does best to hardness of the composites, while at 700 ℃ for 36 h it is the most beneficial to their comprehensive mechanical properties. 利用无压浸渗法制备B4C/2024Al复合材料,并通过XRD、SEM和力学性能检测研究热处理对复合材料相组成以及材料性能的影响。结果表明,B4C/2024Al复合材料包含B4C、Al、Al3BC、AlB2和Al2Cu相。经过660、700、800和900°C热处理12、24或36 h后,相种类并没有变化,但是相含量发生显著改变。此外,经热处理,材料的硬度得到显著提高,抗弯强度有所下降。经800°C热处理36 h的材料硬度最高,经700°C热处理36 h的材料具有最优良的综合性能。
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第7期2359-2365,共7页 中国有色金属学报(英文版)
基金 Project(2011CB605805)supported by the National Basic Research Program of China
关键词 B4C/2024Al composites heat treatment pressureless infiltration HARDNESS bending strength B4C/2024Al复合材料 热处理 无压浸渗法 硬度 抗弯强度
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