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| 1 | 功能梯度铜基复合材料的制备及干摩擦磨损性能(英文)显示文摘采用水平离心铸造工艺,制备功能梯度铜基复合材料,并对其非润滑滑动性能进行了研究.采用基于Taguchi的L27正交实验对石墨颗粒含量较高的空心圆柱铸件内壁厚度的磨损速率和摩擦系数进行分析.直接或间接影响磨损速率的工艺参数包括:施加的载荷(15,25和35 N)、滑动速度(1.5,2.5和3.5 m/s)和滑动距离(750,1500和2250 m).磨损速率和摩擦系数与施加的载荷和滑动距离呈比例的依赖性,而在中间滑动速度期间表现出下降.信噪比在'较小-较好'的基础上预测最小三波条件.方差分析量化参数的影响及其相互作用.采用回归分析对实验数据进行验证.在磨损表面分析过程中,通过显微镜和扫描电子显微镜发现磨损机制和机械混合层的形成. | N.RADHIKA Manu SAM | 2019 | Journal of Central South University2019，26，11： | 4 |
| 2 | 离心铸造制备功能梯度铝基复合材料及增强相对其力学和磨损性能的影响(英文)显示文摘采用离心铸造法制备增强相质量分数为12%的Al/B4C、Al/Si C、Al/Al2O3和Al/Ti B2复合材料并制成空心圆柱状试样。观察了所有试样外表面的显微组织特征及增强相的偏析。通过硬度和拉伸测试研究了不同增强相复合材料的梯度性能。结果表明,除Al/B4C外,所有复合材料外缘的硬度更高,所有复合材料外表面的拉伸强度更高。对所有复合材料的外缘进行摩擦磨损试验,结果表明Al/Ti B2复合材料的磨损率较小。 | N.RADHIKA R.RAGHU | 2016 | Transactions of Nonferrous Metals Society of China2016，26，4： | 3 |
| 3 | Effect of reinforcement content on the adhesive wear behavior of Cu10Sn5Ni/Si3N4 composites produced by stir casting显示文摘The main objective of this paper was to fabricate Cu_(10)Sn_5Ni alloy and its composites reinforced with various contents of Si_3N_4 particles(5wt%, 10wt%, and 15wt%) and to investigate their dry sliding wear behavior using a pin-on-disk tribometer. Microstructural examinations of the specimens revealed a uniform dispersion of Si_3N_4 particles in the copper matrix. Wear experiments were performed for all combinations of parameters, such as load(10, 20, and 30 N), sliding distance(500, 1000, and 1500 m), and sliding velocity(1, 2, and 3 m/s), for the alloy and the composites. The results revealed that wear rate increased with increasing load and increasing sliding distance, whereas the wear rate decreased and then increased with increasing sliding velocity. The primary wear mechanism encountered at low loads was mild adhesive wear, whereas that at high loads was severe delamination wear. An oxide layer was formed at low velocities, whereas a combination of shear and plastic deformation occurred at high velocities. The mechanism at short sliding distances was ploughing action of Si_3N_4 particles, which act as protrusions; by contrast, at long sliding distances, direct metal–metal contact occurred. Among the investigated samples, the Cu/10wt% Si_3N_4 composite exhibited the best wear resistance at a load of 10 N, a velocity of 2 m/s, and a sliding distance of 500 m. | K.Sanesh S.Shiam Sunder N.Radhika | 2017 | International Journal of Minerals,Metallurgy and Materials2017，24，9： | 1 |
| 4 | Influence of carbide ceramic reinforcements in improving tribological properties of A333 graded hybrid composites显示文摘Aluminium hybrid functionally graded metal matrix composites(FGMMCs),meet growing demands for supreme tribo-mechanical performance in automotive and aviation industry.This research experimentally compares the influence of carbide ceramics(B_(4)C,SiC,TiC)as reinforcements,in improving reciprocating tribology performance and mechanical strength of A333 hybrid composites against alloy.Hollow cylindrical samples of A333/6 wt%B_(4)C/4 wt%TiC and A333/6 wt%B_(4)C/4 wt%SiC hybrid FGMMCs were developed using horizontal centrifugal casting.Metallography analysis on both composites revealed increasing ceramic gradient distribution towards outer composite wall.Particle rich zone of A333/B_(4)C/SiC hybrid FGMMC showed maximum micro-hardness(198.9 HV)and tensile strength(267.9 MPa).Elemental mapping confirmed effective distribution of ceramics and detected elemental composition of both composites.Particle rich layer of A333/B_(4)C/SiC hybrid FGMMC exhibited improved wear resistance in comparison with all three layers of A333/B_(4)C/TiC hybrid FGMMC and alloy.Third-body abrasion and tribo-chemical wear were the predominant mechanisms revealed for both composites during worn surface analysis. | Manu Sam N.Radhika | 2022 | Defence Technology(防务技术)2022，18，7： | 0 |
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