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项目的更广泛的影响/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。 解决钛和钛合金耐磨性差的问题的能力促进并加速了钛合金在许多市场中用于机械部件的利用。 这对于那些需要具有高耐腐蚀性的材料、处理高温的能力以及具有高拉伸强度与密度比的材料的市场尤其有利。这项技术将使汽车和航空航天行业的第一市场受益匪浅，预计钛的利用率将大幅增长。该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。该I-Corps项目将进一步开发钛和钛合金的新表面处理。表面处理包括通过热化学过程产生的改性氧化层。在最初生成氧化物层之后，后氮化工艺产生在二氧化钛基质中含有纳米晶体氮化钛的独特结构。经过这种表面处理的试样的耐磨性和耐腐蚀性已与未经处理的试样和经过其他市售工程表面处理的试样进行了基准测试。纳米复合材料转化的表面显示出在干燥和摩擦腐蚀环境中的耐磨性提高了300倍，并且比热氧化和氮化提高了10倍。这项技术是对之前用于获得这种独特表面形态的尝试的改进，之前的尝试使用有毒化学品，在涂层中留下危险污染物。该奖项反映了NSF的法定使命，并且通过使用基金会的知识价值进行评估，被认为值得支持和更广泛的影响审查标准。