SBIR PHASE II: Nanostructured WC/Co Coatings for Enhanced Wear Resistance Applications

该小型企业创新研究(SBIR)二期项目通过集成两种新工艺继续开发纳米碳化钨钴涂层：i)低温喷射沉积工艺(动力学金属化)；ii)纳米晶粉末沉积工艺。第一阶段的研究结果表明，这两种方法可以协同结合，合成独特的热喷涂粉末新成分。第二阶段的工作重点是粉末制造和沉积技术的缩放和优化。如果成功，该工艺和材料系统可以为铬基涂层提供一种环境可接受的替代品。一种具有良好疲劳性能的NC-WC-Co涂层体系，如果能以较低的成本制备，必将为硬质合金涂层提供一种新的选择。由此产生的环境效益将是巨大的。这项拟议的技术还声称，与目前可用的设备相比，所述沉积设备的拥有成本更低。该技术在包括航空航天、发电、石油和天然气钻探、国防和医疗行业在内的许多关键行业具有重要的广泛应用。

This Small Business Innovation Research (SBIR) Phase II project continued development of nano-crystalline tungsten carbide-cobalt coatings by integrating two novel processes: i) a low temperature spray deposition process (kinetic metallization), and ii) a nano-crystalline powder deposition process. The results of Phase I research demonstrated that the two proposed methods can be synergistically combined to synthesize unique new compositions of powders for thermal spray coating process. The Phase II work is focused on the scaling and optimization of the powder manufacture and deposition techniques. If successful, the process and material system can provide an environmentally acceptable replacement for chromium-based coatings. A nc-WC-Co coating system with good fatigue properties will certainly provide an alternative to hard Chrome coatings, if it can be fabricated cost effectively. The environmental benefit resulting from this will be significant. The proposed technique is also claimed to result in a deposition equipment at a lower cost of ownership as compared to curently available equipment. The technique has significant broad applications in a number of key industries, including aerospace, power generation, oil and gas drilling, defense and medical industries.