Formation and Properties of Selecting Functionally Gradient Sprayed Coating by Direct Diode Laser/ Cold Spray Process

直接二极管激光/冷喷涂工艺选择功能梯度喷涂层的形成及性能

基本信息

批准号：
17560644
负责人：
MORIMOTO Junji
金额：
$ 1.28万
依托单位：
KINKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560644/
关键词：
Metal Ceramic Composite Coating TiO_2-Zn Coating Cr_3C_2-NiCr coating Laser remelting process Wear Resistance Photo-catalytic property Direct Diode Laser Cold Spray Process 硬さプラスチックス Ni基自溶合金粉末セラミックス粉末耐食性

项目摘要

A thermal sprayed coating is formed by the successive deposition of a stream of molten droplets through the impacting, flattening, and rapid solidification and cooling processes. In the new solid cold spray process, the coating is formed by high-velocity particles impacting to the substrate to be coated without heat. These particles bond mechanically with the substrate by way of plastic deformation only. In order to help establish innovative and cost-effective applications of plastic materials in the automotive and chemical industry as well as in medical technology, surface modification is becoming more and more important as a complement or alternative to the development of new plastic materials with specific physical and chemical profiles. Commonly, polymer surfaces are coated by metallization, to enhance tribological properties or chemical resistance and to provide electromagnetic shielding or decorative effects. Examples for industrial surface refinement techniques are chemical coating, ion implantation and thermal spray coating.In this study, the performance of a newly developed solid cold spraying apparatus and the photo-catalytic properties of TiO_2-Zn coatings were examined. TiO_2-Zn coatings were post-treated by direct diode laser and examined its mechanical properties in compare with that formed by solid cold spray process. The photo-catalytic properties of laser treated TiO_2-Zn coatings on a plastic substrate were equivalent to that of cold sprayed TiO_2-Zn coatings. We treated Cr_3C_2 coatings by laser irradiation treatment and examined its hardness in comparison with that formed by HVOF process. Consequently, the average hardness of laser treated Cr_3C_2-NiCr coating was found out to be higher than that of HVOF coatings. The laser treated Cr_3C_2-NiCr coating further improved the solid particle erosion resistance by a factor of almost twice.

热喷涂涂层是通过熔融液滴流通过冲击、压平、快速凝固和冷却过程连续沉积而形成的。在新型固体冷喷涂工艺中，涂层是通过高速粒子撞击待涂基材而形成的，无需加热。这些颗粒仅通过塑性变形与基材机械结合。为了帮助塑料材料在汽车、化学工业以及医疗技术中建立创新且经济高效的应用，表面改性作为开发具有特定物理性能的新型塑料材料的补充或替代变得越来越重要。和化学概况。通常，聚合物表面经过金属化处理，以增强摩擦性能或耐化学性，并提供电磁屏蔽或装饰效果。工业表面细化技术的例子有化学涂层、离子注入和热喷涂。本研究对新开发的固体冷喷涂装置的性能和TiO_2-Zn涂层的光催化性能进行了研究。采用直接二极管激光对TiO_2-Zn涂层进行后处理，并与固体冷喷涂工艺形成的涂层进行比较，考察其力学性能。塑料基材上激光处理的TiO_2-Zn涂层的光催化性能与冷喷涂TiO_2-Zn涂层相当。我们通过激光辐照处理对Cr_3C_2涂层进行处理，并与HVOF工艺形成的涂层进行比较，检查其硬度。结果表明，激光处理的Cr_3C_2-NiCr涂层的平均硬度高于HVOF涂层。激光处理的Cr_3C_2-NiCr涂层进一步将耐固体颗粒侵蚀性提高了近两倍。