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In situ fabrication of aluminide coatings and rapid prototyping by laser cladding

铝化物涂层的原位制造和激光熔覆快速原型制作

基本信息

批准号：
213935035
负责人：
Professor Dr.-Ing. Frank Mücklich
金额：
--
依托单位：
Lehrstuhl für Funktionswerkstoffe
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/213935035?language=en
关键词：
situ fabrication aluminide coatings rapid

项目摘要

The intermetallic compound ruthenium aluminide (B2-RuAl) possesses a unique combination of properties. It is reported to have high ductility at room temperature, good oxidation and corrosion resistance as well as high thermal stability. The industrial application of RuAl is hindered by problems which arise during processing with conventional methods.It had therefore been the aim of the initial DFG-proposal to evaluate the possibility of laser cladding RuAl . Crack-free Coatings and three-dimensional structures have successfully been produced using elemental powder blends in the context of the first project. Furthermore, their phase compositions have been revealed in detail.It is the first aim of the follow-up project to optimise the manufacturing process for the coatings and structures in a way that they can be more easily transferred to industrial applications. Therefore, the powder mixtures shall be mechanically alloyed before the process. Laser cladding with mechanically alloyed powder has the potential to combine the advantages of the use of elemental powder mixtures and pre-alloyed powder. Since the iterative procedure during process optimisation as well as the used characterisation methods have shown to be very successful during the first project, they should be kept during the follow-up project.Secondly, the friction properties and wear resistance of the coatings under dry conditions should be evaluated and compared to technically relevant materials since these properties are crucial criteria for the applicability of the aluminide coatings and since they have not been tested for RuAl, yet.

金属间化合物铝化钌（B2-RuAl）具有独特的性能组合。据报道，它在室温下具有高延展性，良好的抗氧化性和耐腐蚀性以及高热稳定性。RuAl的工业应用受到传统方法加工过程中出现的问题的阻碍，因此DFG最初建议的目的是评估激光熔覆RuAl的可能性。在第一个项目中，使用元素粉末混合物成功地生产了无裂纹涂层和三维结构。后续项目的首要目标是优化涂层和结构的制造工艺，使其更容易转移到工业应用中。因此，粉末混合物应在加工前进行机械合金化。采用机械合金化粉末的激光熔覆具有联合收割机结合使用元素粉末混合物和预合金化粉末的优点的潜力。由于工艺优化过程中的迭代程序以及所使用的表征方法在第一个项目中非常成功，因此应在后续项目中保留它们。应评估涂层在干燥条件下的摩擦性能和耐磨性，并与技术上相关的材料进行比较，因为这些性能是铝化物涂层适用性的关键标准，因为它们还没有被检测出是否含有RuAl