石墨烯薄膜对GCr_(15)轴承钢表面导热特性的影响  

Effect of Graphene Film on the Thermal Conductivity of GCr_(15) Bearing Steel Surface

作　　者：张丽秀[1,2,3] 腾达 吴玉厚 王丽艳[3] ZHANG Lixiu;TENG Da;WU Yuhou;WANG Liyan(Shenyang Jianzhu University Analysis and Testing Technology Research Center,Shenyang,China,110168;Shenyang Jianzhu University National High-end Stone CNC Processing Equipment and Technology National and Local Joint Engineering Laboratory,Shenyang,China,110168;School of Mechanical,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学分析与检测技术研究中心,辽宁沈阳110168 [2]沈阳建筑大学高档石材数控加工装备与技术国家地方联合工程实验室,辽宁沈阳110168 [3]沈阳建筑大学机械工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2021年第4期739-745,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51675353)。

摘　　要：目的研究石墨烯附着GCr_(15)轴承钢热导率,并探究石墨烯附着层对GCr_(15)轴承钢表面热传导的影响。方法应用分子动力学模拟和热导率实验两种方法分别测试298 K、356 K、414 K、473 K、532 K温度下附着试件的热导率。摩擦实验中,调整石墨烯附着面积并且观察测点温度以及摩擦系数,测定石墨烯附着层对试件表面热传导的影响规律。结果温度在298~532 K内,附着试件热导率最高提升1 W/(m·K),最低提升0.5 W/(m·K)。石墨烯附着层使试件在附着层垂直方向的热导率降低了2 W/(m·K),使试件表面温度降低4℃。同时,石墨烯附着层可加快试件表面的热传导,且此特点基本不受温度影响。结论石墨烯膜加速热量传递,改善磨痕区域温度分布。石墨烯薄膜随着摩擦运动向磨痕边缘滑移直至脱落,此时摩擦加剧。Study the thermal conductivity of graphene attached GCr_(15)bearing steel(attached sample),and explore the effect of graphene adhesion layer on the thermal conductivity of GCr_(15)bearing steel(sample)surface.Two methods of molecular dynamics simulation and thermal conductivity experiment were applied to 298 K,356 K,414 K,473 K,532 K temperature of the attached sample to conduct thermal conductivity study.In the friction experiment,adjust the graphene adhesion area and observe the measuring point temperature and friction coefficient to study the effect of the graphene adhesion layer on the sample surface thermal conductivity.Temperature Within 298~532 K,the thermal conductivity of the attached sample is increased by a maximum of 1 W/(m·K)and the lowest by 0.5 W/(m·K).The graphene adhesion layer reduces the thermal conductivity of the sample in the vertical direction of the graphene adhesion layer 2 W/(m·K).The graphene adhesion layer reduces the sample surface temperature by 4℃.The graphene adhesion layer accelerates the heat conduction on the surface of the sample,and is weakly affected by temperature The adhesion of graphene to the friction pair can reduce the heat deposition at the friction place,and reduce the temperature and temperature rise rate of the wear scar.The graphene adhesive layer slides towards the edge of the wear mark with friction motion until it falls off,at which time the friction intensifies.

关 键 词：GCr_(15)轴承钢 石墨烯 导热系数 分子动力学 热扩散系数 

分 类 号：O482.2[理学—固体物理]