Abstract: Three-dimensional network configuration representative volume element (RVE) models were built to investigate thermal properties of conductive silicon greases containing different fractions of AlN/C/Ag by applying a Monte Carlo controllable spatial distribution algorithm. Thermal conductive silicon greases containing AlN, AlN/C and AlN/C/Ag were prepared, the thermal conductivity and the volume resistivity of all samples were experimentally measured. The electrical tribological properties were stu-died with a reciprocating friction/wear testing machine under iron/iron contacting at room temperature. SEM and EDS were utilized to observe and analyze the friction area after test. It is found that affluent morphology of conductive fillers will lead to generate compact thermal conductive network, and the thermal conductivity of AlN/C/Ag can be up to 1.623 W/(m·K), which means that the less loading of fillers can obtain higher thermal conductivity. Meanwhile, the simulation result of finite model of AlN/C/Ag has a better agreement with the experimental result at the same mass fraction, which can be used to predict thermal conductivity of silicon greases with sphere/flake/stick fillers. The optimal electrical tribological properties of AlN/C/Ag thermal conductive silicon grease are ascribed to the function of thermal conductivity and electrical conductivity combined, which can be helpful to abate the arc erosion on the friction contacts.
1 Yu W, Xie H, Yin L, et al. Exceptionally high thermal conductivity of thermal grease: Synergistic effects of graphene and alumina[J].International Journal of Thermal Science,2015,91:76. 2 Cho E C, Huang J H, Li C P, et al. Graphene-based thermoplastic composites and their application for LED thermal management[J].Carbon,2016,102:66. 3 Cao Z, Xia Y, Xi X. Nano-montmorillonite-doped lubricating grease exhibiting excellent insulating and tribological properties[J].Friction,2017,5(2):219. 4 Ye K, Zhong Z, Ren T B. Research progress of thermal conductive silicon grease[J].China Adhesives,2013,22(12):50(in Chinese). 叶宽,钟震,任天斌.导热硅脂研究进展[J].中国胶粘剂,2013,22(12):50. 5 Yuan W H. Application in the electric field of thermal conductive silicon grease[J].China Appliance Technology,1992(6):12(in Chinese). 袁卫华.导热硅脂在电气领域中的应用[J].家用电器科技,1992(6):12. 6 Feng H, Liu J R. Development and study on a new nanocopper thermal silicon grease[J].New Chemical Materials,2006,34(11):20(in Chinese). 俸颢,刘静茹.新型纳米铜导热硅脂的研制和性能研究[J].化工新型材料,2006,34(11): 20. 7 Cui W, Zhu Y, Yuan X Y, et al. Preparation and characterization of silicon grease with high thermal conductivity and high electrical insulation[J].Rare Metal Materials and Engineering,2011(s1):443(in Chinese). 崔巍,祝渊,袁轩一,等.高导热高绝缘导热硅脂的制备及性能表征[J].稀有金属材料与工程,2011(s1):443. 8 Liu J W, Yang W B, Tian B Q, et al. Thermal conductivity of pa-raffin/HDPE/expanded graphite phase change composite[J].Polymer Materials Science and Engineering,2015(5):83(in Chinese). 刘菁伟,杨文彬,田本强,等.石蜡/高密度聚乙烯/膨胀石墨导热增强型复合相变材料热导率的影响因素[J].高分子材料科学与工程,2015(5):83. 9 Gou Y J, Liu Z L, Zhang G M, et al. Influence of multi-walled carbon nanotubes length on thermal properties of thermal grease[J].Journal of Engineering Thermophysics,2014(6):1185(in Chinese). 勾昱君,刘中良,张广孟,等.多壁碳纳米管长度对导热硅脂导热性能的影响[J].工程热物理学报,2014(6):1185. 10 Tu W Y, Zhang H Y, Lin J, et al. Preparation and properties of multilayer graphite/silicon resin thermal conductive material[J].Acta Materials Composite Sinica,2013,30(2):70(in Chinese). 涂文英,张海燕,林锦,等.多层石墨/硅树脂导热复合材料的制备与性能[J].复合材料学报,2013,30(2):70. 11 Liu K, Liu Y, Wu D M, et al. Effect of flake graphite orientation on thermal conductivity of flake graphite/polypropylene, flake graphi-te/nylon66 composites[J].Acta Materials Composite Sinica,2014,31(3):610(in Chinese). 刘科,刘颖,吴大鸣,等.鳞片石墨取向对鳞片石墨/聚丙烯、鳞片石墨/尼龙66复合材料导热性能的影响[J].复合材料学报,2014,31(3):610. 12 Liu J F, Yuan H, Du B, et al. Thermal conductivity of the carbon nanotube/silicon grease composite[J].Journal of Materials Science and Engineering,2009(2):271(in Chinese). 刘俊峰,袁华,杜波,等.碳纳米管/导热硅脂复合材料的导热性能[J].材料科学与工程学报,2009(2):271. 13 Liu Y L, Chen J R, She X X, et al. Study on preparation and thermal conductivity of silicon grease with nano-metal oxides[J].Guangdong Chemical Industry,2015,42(23):35(in Chinese). 刘彦良,陈建荣,佘晓晓,等.纳米金属氧化物导热硅脂的制备及导热性能的研究[J].广东化工,2015,42(23):35. 14 Fu Y X, Zhou J X, Mo D C, et al. Study on preparation and thermal conductivity of silicon grease with graphite sheets cooperating with aluminum oxide powders[J].Journal of Engineering Thermophysics,2015(10):2231(in Chinese). 符远翔,周君贤,莫冬传,等.石墨烯片协同氧化铝导热硅脂的制备及其导热性能研究[J].工程热物理学报,2015(10):2231. 15 Yu W, Chen L F, Qi Y, et al. Synergistic effects for enhancing composite’s thermal conductivity through the hybrid of graphene and spherical nanoparticles[J].Journal of Engineering Thermophysics,2016(11):2463(in Chinese). 于伟,陈立飞,齐玉,等.石墨烯与纳米颗粒协同提高复合体系热导率[J].工程热物理学报,2016(11):2463. 16 Liu C, Xia Y Q, Cao Z F. Conductivity and tribologicl properties of carbon nanotubes in grease[J].Tribology,2015,35(4):393(in Chinese). 刘椿,夏延秋,曹正锋.碳纳米管在润滑脂中的导电性和摩擦学性能研究[J].摩擦学学报,2015,35(4):393. 17 Ge X Y, Xia Y Q, Feng X, et al. Electrical conductivities and tribological properties of lithium salts conductive grease[J].Journal of Mechanical Engineering,2015(15):61(in Chinese). 葛翔宇,夏延秋,冯欣,等.锂盐型电力复合脂的导电性和摩擦学性能[J].机械工程学报,2015(15):61. 18 Agari Y, Uno T. Estimation on thermal conductivities of filled polymers[J].Journal of Applied Polymer Science,1986,32(7):5705. 19 Xi X, Xia Y. An investigation of thermal and tribological behaviors of PTFE-based silicon composites filled with AlN and flake graphite particles[J].Journal of Applied Polymer Science,2017,134(36):1. 20 Lewis T B, Nielsen L E. Dynamic mechanical properties of particulate-filled composites[J].Journal of Applied Polymer Science,1970,14(6):1449. 21 Zhang X G, Li X, Zhang B K, et al. Thermal conductivity of EPDM rubber filled with AlN[J].Polymer Materials Science and Enginee-ring,2015(6):92(in Chinese). 张晓光,李霄,张宝库,等.氮化铝填充三元乙丙橡胶复合材料的导热性能[J].高分子材料科学与工程,2015(6):92. 22 Zhang X G, Li X, Ji Y J, et al. Effect of the thermal conductivity of filler particles on heat conduction property of composites[J].Mate-rials Review B:Research Papers,2013,27(7):63(in Chinese). 张晓光,李霄,冀英杰,等.填充颗粒导热性对复合材料导热性能的影响[J].材料导报:研究篇,2013,27(7):63. 23 Segurado J, González C, Llorca J. A numerical investigation of the effect of particle clustering on the mechanical properties of compo-sites[J].Acta Materialia,2003,51(8):2355. 24 Liu J Q, Lu Y L, Yang H B, et al. Numerical investigation of the effect of particle spatial distribution on the thermal conductivity of composites[J].Acta Materials Composite Sinica,2011,28(5):12(in Chinese). 刘加奇,卢咏来,杨海波,等.粒子空间分布与复合材料导热性能关系的模拟研究[J].复合材料学报,2011,28(5):12. 25 Cao Z F, Xia Y Q, Chen J H. Tribological properties of vapor carbon fibers as conductive additive in grease[J].Tribology,2016,36(2):137(in Chinese). 曹正锋,夏延秋,陈俊寰.气相生长碳纤维作为润滑脂导电填料的摩擦学性能研究[J].摩擦学学报,2016,36(2):137. 26 Xi X, Xia Y Q, Cao Z F. Friction reducing and anti-wear properties and mechanism of montmorillonite as lubricant additives in lithium complex grease[J].Journal of Chinese Ceramic Society,2017,45(8):1159(in Chinese). 席翔,夏延秋,曹正锋.蒙脱石作为润滑脂添加剂的减摩抗磨性能及机理[J].硅酸盐学报,2017,45(8):1159. 27 Xi X, Xi Y Q, Cao Z F, et al. Tribology performance of high speed arc spraying Al-Ni-Mm-Co coating under lubrication conditions of different greases[J].China Mechanical Engineering,2017,28(2):215(in Chinese). 席翔,夏延秋,曹正锋,等.高速电弧喷涂Al-Ni-Mm-Co涂层在脂润滑下的摩擦磨损性能[J].中国机械工程,2017,28(2):215. 28 Chen H, Zhu D S, Qi X L, et al. Effect of graphite flake on the thermal conductivity of organic phase change materials[J].Materials Review B:Research Papers,2011,25(11):56(in Chinese). 陈宏,朱冬生,漆小玲,等.石墨片层对有机相变材料导热性能的影响[J].材料导报:研究篇,2011,25(11):56. 29 Ji S Y, Sun L M. Factors of impact of electric friction and wear on arc[J].Materials Review B:Research Papers,2011,25(7):111(in Chinese). 冀盛亚,孙乐民.载流摩擦磨损中影响起弧的因素分析[J].材料导报:研究篇,2011,25(7):111.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2018, Vol. 32 
