烧结工艺对石墨烯镁基复合材料组织及性能影响  

Effect of sintering process on microstructure and properties of graphene magnesium matrix composite

作　　者：龙敏 管晓光 马梦祺 兰贵新 王吉孝 刘睿智 张仁军[3] LONG Min;GUAN Xian-guang;MA Meng-qi;LAN Gui-xin;WANG Ji-xiao;LIU Rui-zhi;ZHANG Ren-jun(Heilongjiang University Of Science And Technology Materials Science and Engineering college,Harbin 150022,China;Yankuang donghua heary industry CO.,LTD,Jinan 250000,China;Harbin Turbine Works Co.,Ltd,Harbin 150046,China)

机构地区：[1]黑龙江科技大学材料科学与工程学院,哈尔滨150022 [2]兖矿集团东华重工煤机装备制造分公司,济南250000 [3]哈尔滨汽轮机厂有限责任公司,哈尔滨150046

出　　处：《炭素》2019年第4期14-18,共5页Carbon

摘　　要：在AZ91合金粉中添加0.2%的石墨烯采用真空热压烧结技术制备石墨烯钱基复合材料。通过金相试验、显微硬度试验、X射线衍射分析、电化学等试验研究不同烧结工艺对复合材料的组织及性能的影响。结果表明,在保温时间不变的前提下,随着烧结温度的升高,晶粒逐渐细化,硬度逐渐升高。在烧结温度不变时,随着保温时间的延长晶粒略有长大,材料硬度降低。温度较低时,保温时间对材料的耐蚀性影响较小。当温度升高时到一定数值时,随保温时间的延长,耐蚀性下降。综合来看,在烧结温度为610℃,保温时间为30min时石墨烯钱基复合材料性能最佳。The magnesium matrix composite materials added by 0.2%graphite were prepared by vacuum hot pressing sintering using graphene and AZ91 powders.The effects on microstructure and properties of the composites were investigated under different vacuum hot pressing sintering processes.Many tests were applied with such as metallographic test,microhardness test,X-ray diffraction analysis and electrochemical test.Il is showed the grain sides is gradually refined and hardness increased with the increasing of sintering temperature with the constant holding time.Under the same sintering temperature,the grain hardness is decreased with the increasing of the holding time.The effect on the corrosion resistance is little for the dwelling time in the low temperature.Attaining to a certain vacuum hot pressing sintering temperature value,corrosion resistance is decreased with prolonging the dwell time.In a word,it is the best process for the performance of graphite magnesium matrix composites under the process of 610℃ sintering temperature and 30min dwell time.

关 键 词：石墨烯 镁基复合材料 粉末冶金 真空烧结 

分 类 号：TG174.44[金属学及工艺—金属表面处理]