烧结压力对石墨烯增强铜基复合材料组织性能的影响
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摘要
烧结压力是粉末冶金制备材料过程中重要工艺参数之一,通过在石墨烯/铜中添加钛粉以改善二者润湿性,使用超声分散和球磨法进行混粉,用放电等离子烧结(SPS)的方式制备石墨烯铜基复合材料,在5,15,25,30MPa 4种不同压力下进行烧结。用金相显微镜和扫描电子显微镜(SEM)对石墨烯增强铜基复合材料显微结构进行观察,测量试样密度,并采用硬度计、导电率测试仪对力学性能和导电性能进行测试。结果表明,随着烧结压力的升高,复合材料晶粒尺寸不断减小,导电率先上升后下降。当烧结压力达到25 MPa时,导电率最大为51.2%IACS;复合材料的密度和硬度值不断增大。
Sintering pressure is one of the most important parameters in powder metallurgy process.The titanium powder was added in the graphene/copper.Ultrasonic dispersion and ball mill method was used for mixing powder,and then Spark Plasma Sintering method was used for preparation of graphene copper matrix composites with 5,15,25,30 MPa four different sintering pressure.Using metallographic microscope and scanning electron microscope(SEM)to observe the microstructure of graphene reinforced copper matrix composites.Measuring the density,the hardness and electrical conductivity of the sample.The results show that the grain size of the present composite gradually decreases,while conductivity first increases and then decreases with increasing sintering pressure.When the sintering pressure reaches 25 MPa,the maximum of the conductivity is 51.2%IACS.As the pressure ranges from 5 to 30 MPa,the density and hardness of the composite continually enhance,respectively.
Sintering pressure is one of the most important parameters in powder metallurgy process.The titanium powder was added in the graphene/copper.Ultrasonic dispersion and ball mill method was used for mixing powder,and then Spark Plasma Sintering method was used for preparation of graphene copper matrix composites with 5,15,25,30 MPa four different sintering pressure.Using metallographic microscope and scanning electron microscope(SEM)to observe the microstructure of graphene reinforced copper matrix composites.Measuring the density,the hardness and electrical conductivity of the sample.The results show that the grain size of the present composite gradually decreases,while conductivity first increases and then decreases with increasing sintering pressure.When the sintering pressure reaches 25 MPa,the maximum of the conductivity is 51.2%IACS.As the pressure ranges from 5 to 30 MPa,the density and hardness of the composite continually enhance,respectively.
引文
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[2]Balandin A A,Ghosh S,Bao W,et al.Superior thermal conductivity of single-layer graphene[J].Nano Letters,2008,8(3):902-913.
[3]Chen J H,Jang C,Xiao S,et al.Intrinsic and extrinsic performance limits of graphene devices on SiO2[J].Nature Nanotechnology,2008,3(4):206-219.
[4]Gan Guijinag.Preparation and properties of nickel/graphene-copper based powder metallurgy friction materials[D].Zhengjiang:Jiangsu University,2017(in Chinese).甘贵江.镍/石墨烯-铜基粉末冶金摩擦材料的制备及性能研究[D].镇江:江苏大学,2017.
[5]Wei Bangzheng,Chen Wenchao,Zhu Xi,et al.Electroless copper plating of graphene and its effect on the microstructure and properties of graphene/copper matrix composites[J].Powder Metallurgy,2018,36(05):363-369(in Chinese).魏邦争,陈闻超,朱曦,等.石墨烯化学镀铜及其对石墨烯/铜基复合材料组织性能的影响[J].粉末冶金技术,2018,36(05):363-369.
[6]Tang Y,Yang X,Wang R,et al.Enhancement of the mechanical properties of graphene-copper composites with graphene-nickel hybrids[J].Materials Science&Engineering A,2014,599(2):247-254.
[7]Zhao Jing,Jie Yingfang.Effect of plasma sintering pressure on microstructure and properties of 92WC-8Co nanometer cemented carbide[J].Rare Metals and Hard Alloys,2011,39(2):54-56(in Chinese).赵静,解迎芳.放电等离子烧结压力对92WC-8Co纳米硬质合金组织及性能的影响[J].稀有金属与硬质合金,2011,39(2):54-56.
[8]Feng Siqing,Zhang Guangsheng,Niu Duan.Effect of sintering pressure on microstructure and properties of ferrous materials in powder metallurgy[J].Modern Manufacturing Engineering,2011,1(3):62-65(in Chinese).冯思庆,张光胜,牛顿.烧结压力对粉末冶金铁基材料显微组织与性能的影响研究[J].现代制造工程,2011,1(3):62-65.
[9]Li Zhilin,Zhu Lihui,Liu Yixiong,et al.Effect of pressure on properties of plasma sintered cemented carbide[J].Powder Metallurgy Industry,2009,19(1):8-17(in Chinese).李志林,朱丽慧,刘一雄,等.压力对放电等离子烧结硬质合金性能的影响[J].粉末冶金工业,2009,19(1):8-17.
[10]Wei Huan,Wei Yinghui,Hou Lifeng.Phase transformation and application of aging hardened copper-titanium alloy[J].Journal of Functional Materials,2015,46(10):10001-10012(in Chinese).卫欢,卫英慧,侯利锋.时效硬化铜钛合金的相变和应用[J].功能材料,2015,46(10):10001-10012.
[11]Yi Zhenghua,Yi Maozhong,Ran Liping,et al.Effects of titanium on copper penetration of carbon/carbon composites[J].Journal of China Nonferrous Metals,2006,1(07):1214-1218(in Chinese).易振华,易茂中,冉丽萍,等.添加钛对炭/炭复合材料渗铜的影响[J].中国有色金属学报,2006,1(07):1214-1218.
[12]Ye Yushun,Zuo Xiaoqing,Yang Munan,et al.Study on relative density and properties of pressure sintered copper-graphite composites[J].Journal of Function Materials,2014,45(19):19030-19034(in Chinese).叶雨顺,左孝青,杨牧南,等.压力烧结铜-石墨复合材料的相对密度及性能研究[J].功能材料,2014,45(19):19030-19034.
[13]Fu Shaoli,Liu Ping,Hui Xiaohong,et al.The effect of SPS technology on the microstructure and properties of CuCr/CNTs composites[J].Nonferrous Materials and Engineering,2017,38(2):78-84(in Chinese).付少利,刘平,喙小红,等.SPS工艺对CuCr/CNTs复合材料组织性能的影响[J].有色金属材料与工程,2017,38(2):78-84.
[14]Chen Chunhao,Zeng Yun,Xue Lihong,et al.Effect of plasma sintering temperature on ultrafine crystalline w-40cu composites[J].Special Casting and Non-ferrous Alloys,2011,31(12):1151-1154(in Chinese).陈春浩,曾云,薛丽红,等.放电等离子烧结温度对超细晶W-40Cu复合材料的影响[J].特种铸造及有色合金,2011,31(12):1151-1154.
[15]Sun Lan,Li Chang'an,Jia Chengchang.Effect of plasma sintering pressure on properties of ultra-fine WC-Co cemented carbide[J].Cemented Carbide,2012,29(1):19-23(in Chinese).孙兰,李长案,贾成厂.放电等离子烧结压力对超细WC-Co硬质合金性能的影响[J].硬质合金,2012,29(1):19-23.