The application of wear resistant coatings onto the wall of aluminium engine cylinder bores by thermal spray have seen much development over the last 10 years, with regards to both equipment design and also to the material system used. While the technology has been successful in allowing the implementation of aluminium engine blocks into mass production, there is still room for improvement. One area that can be improved is the preparation of the substrate material in order to allow a good adhesion of the thermal spray coating. Grit blasting, a traditional preparation technique, is undesirable for a mass production environment due to the risk of the assembly areas becoming contaminated with grit. Therefore, an alternative method has been sought that can offer a suitable bond strength without introducing potential risks in the manufacture line. In this study, NiAl bond coats were sprayed onto aluminium substrates using the Plasma Transferred Wire Arc (PTWA) coating system developed by Ford Motor Company. A variety of surface preparation techniques, including traditional and some more novel methods, were used and analysed with respect to bond strength, ease of application and cost.
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机译：耐磨涂层在铝合金发动机缸孔壁上通过热喷雾在过去10年中显示出很大的发展，在过去10年中，对于设备设计以及所使用的材料系统，也有很大的发展。虽然该技术成功地允许实施铝合金发动机块进入大规模生产，但仍有改进的余地。可以改善的一个区域是衬底材料的制备，以便允许热喷涂涂层的良好粘附。一种传统的制备技术，一种传统的制备技术，对于大规模生产环境来说，由于装配地区被污染的风险，这是一种传统的制备技术，这是不希望的。因此，已经寻求一种替代方法，其可以提供合适的粘合强度而不会在制造线中引入潜在的风险。在该研究中，使用由FORD Motor Company开发的等离子体转印的钢丝弧（PTWA）涂布系统将Nial键涂层喷涂到铝基板上。通过粘合强度，易于应用和成本，使用和分析各种表面制备技术，包括传统和一些新方法。
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