I-Corps: Nanostructured wear and corrosion resistant surfaces for titanium and titanium alloy applications

I-Corps：适用于钛和钛合金应用的纳米结构耐磨和耐腐蚀表面

• 批准号: 1941247
• 负责人: Gary Doll
• 金额: $ 5万
• 依托单位: University of Akron
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-15 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1941247&HistoricalAwards=false
• 关键词: Corps; Nanostructured; wear; corrosion; resistant

The broader impact/commercial potential of this I-Corps project affects all industries that employ mechanical components fabricated from titanium or titanium alloys. The ability to solve the problems of poor wear resistance of titanium and titanium alloys facilitates and accelerates the utilization of titanium alloys for mechanical components in many markets. This is especially beneficial for those markets that require materials with high corrosion resistance, the capacity to handle high temperatures, and materials that possess a high tensile strength to density ratio. This technology will potential significantly benefit first markets in the automotive and aerospace industries where titanium utilization is expected to grow significantly. The potential of this project can also extend to biomedical devices and components such as medical implants. Additive manufacturing technologies have accelerated the growth of titanium-containing materials in these and other markets, and this project should contribute synergistically with advanced manufacturing initiatives.This I-Corps project will further develop a new surface treatment for titanium and titanium alloys. The surface treatment consists of a modified oxide layer produced through thermochemical processes. After initially generating an oxide layer, a post nitriding process produces a unique structure containing nanocrystalline titanium nitride in a titanium dioxide matrix. The wear and corrosion resistance of specimens with this surface treatment have been benchmarked against untreated specimens and specimens treated with other commercially available engineered surfaces. The nanocomposite converted surfaces were shown to provide a 300x improvement in the wear resistance in dry and tribocorrosive environments, and a 10x improvement over thermal oxidation and nitriding. This technology is an improvement over previous attempts used to attain this unique surface morphology that used toxic chemicals that leave hazardous contaminants in the coating.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个I-Corps项目的广泛影响/商业潜力影响到所有使用钛或钛合金制造的机械部件的行业。解决钛及钛合金耐磨性差问题的能力，促进和加速了钛合金在许多市场上用于机械部件的应用。这对于那些需要具有高耐腐蚀性的材料、处理高温的能力和具有高抗拉强度与密度比的材料的市场尤其有益。这项技术将有潜力极大地惠及汽车和航空航天工业的第一市场，在这些市场中，钛的利用率有望大幅增长。这个项目的潜力还可以扩展到生物医学设备和组件，如医疗植入物。增材制造技术加速了含钛材料在这些市场和其他市场的增长，该项目应与先进制造计划协同发挥作用。这个I-Corps项目将进一步开发一种新的钛和钛合金表面处理方法。表面处理包括通过热化学过程产生的改性氧化层。在最初生成氧化层后，后氮化工艺在二氧化钛基体中产生含有纳米晶氮化钛的独特结构。用这种表面处理的样品的耐磨性和耐腐蚀性已经与未经处理的样品和用其他市售工程表面处理的样品进行了基准测试。纳米复合材料转化表面在干燥和摩擦腐蚀环境下的耐磨性提高了300倍，比热氧化和氮化提高了10倍。这项技术是对以前的尝试的改进，以前的尝试是为了获得这种独特的表面形态，使用有毒的化学物质，在涂层中留下有害的污染物。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。