EAPSI: Incorporation of Nano-Sized Diamonds in Advanced Composite Coatings for Reduction of Friction and Wear

EAPSI：在先进复合涂层中加入纳米金刚石以减少摩擦和磨损

• 批准号: 1513669
• 负责人: Andy Nieto
• 金额: $ 0.51万
• 依托单位: Nieto Andy
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1513669&HistoricalAwards=false
• 关键词: EAPSI; Incorporation; Nano; Sized; Diamonds

The proposed research will attempt to fabricate advanced coatings with reduced friction and wear, as compared to commercially used materials. Tungsten carbide / cobalt coatings are used today in a wide range of sectors including the aerospace, automotive, and energy industries. The incorporation of nano sized diamonds into these materials to form advanced composite coatings is envisioned to improve the wear resistance and reduce friction. The reduction of friction is critically important to improving energy efficiency; for example, it is estimated that 33% of fuel energy in automobiles is consumed in overcoming frictional losses. The proposed research will be conducted at Yonsei University in South Korea in the laboratory of Dr. Dae Eun Kim. The Center for Nano-Wear directed by Dr. Kim has world class facilities for accessing the friction and wear performance of a variety of materials under several types of environments. The use of nanodiamonds is expected to address several key concerns in tungsten carbide / cobalt coatings. The wear performance of these coatings is dependent on achieving an optimal combination of strength (e.g. hardness) and ductility (e.g. toughness). These properties are often mutually exclusive as they are dependent on constituent phases which are typically either hard and brittle or soft and tough. The use of diamonds is expected to increase hardness while simultaneously providing toughening by inhibiting the formation of brittle phases. The diamonds are expected to act as a source of carbon during the high temperature processing used to make the coatings, which will inhibit the decarburization of tungsten carbide into brittle phases. Diamond also has excellent thermal conductivity which would be beneficial to wear performance in high temperature environments. Wear tests will be conducted to evaluate the performance under simulated loading conditions and also to elucidate the effects of the nanodiamonds on the material properties.

拟议中的研究将试图制造与商业使用的材料相比具有减少摩擦和磨损的先进涂层。碳化钨/钴涂层目前广泛应用于航空航天、汽车和能源行业。将纳米金刚石掺入这些材料中以形成先进的复合涂层，可以提高耐磨性并减少摩擦。减少摩擦对于提高能源效率至关重要;例如，据估计，汽车中33%的燃料能量消耗在克服摩擦损失上。拟议的研究将在韩国延世大学的Dae Eun Kim博士的实验室进行。金博士领导的纳米磨损中心拥有世界一流的设施，可在多种环境下评估各种材料的摩擦和磨损性能。纳米金刚石的使用有望解决碳化钨/钴涂层中的几个关键问题。这些涂层的磨损性能取决于实现强度（例如硬度）和延展性（例如韧性）的最佳组合。这些性质通常是相互排斥的，因为它们取决于通常是硬而脆或软而坚韧的组成相。预期金刚石的使用可增加硬度，同时通过抑制脆性相的形成来提供增韧。金刚石被认为是在高温处理过程中的碳源，用于制造涂层，这将抑制碳化钨脱碳成脆性相。金刚石还具有优异的导热性，这将有利于在高温环境中的磨损性能。将进行磨损测试，以评估在模拟负载条件下的性能，并阐明纳米金刚石对材料性能的影响。