The objective is to develop the complex coating technique with high quality and homogeneity of coating for spherical parts with diameter of 2 ∼ 4 mm and stable mass production shall be secured with consideration of coating material, process and jig design. Silicon oxide-diamond like carbon (SiO-DLC) complex coating chemistry is expected to enhance the high temperature stability as opposed to DLC. Currently, the spherical part is first welded and then assembled with other parts, finally they are coated with DLC. However in this manner, the maximum charging in one coating batch is limited due to the very big size of the whole component which increases cost. Therefore the spherical part is to be coated before welding. Overall, reactive sputtering with high precision fixturing and masking technique resulted in the best overall properties for modern powertrain fuel system. The jig design was optimized with consideration of coating properties (height, width, thickness, inserting distance) and spherical parts were fixed at the jig with magnet plate. Coating material and process were determined with several trials. In conclusion the PVD+PACVD coated parts is developed and coatings with high quality, homogeneity and 30,000 inserting amount are secured. Coated parts are minimum 100 % more durable than non-coated parts.

中文翻译：

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探索用于先进动力总成燃油系统最小零件的复杂涂层技术的有效性

目的是为直径为2到4 mm的球形零件开发高质量，均匀涂层的复杂涂层技术，并应考虑涂层材料，工艺和夹具设计，确保稳定的批量生产。与DLC相比，预计氧化硅-类金刚石碳（SiO-DLC）复合涂层化学作用可提高高温稳定性。目前，先将球形零件焊接起来，然后再与其他零件组装在一起，最后再用DLC涂层。然而，由于整个部件的尺寸很大，因此以这种方式限制了在一个涂料批次中的最大装料量，这增加了成本。因此，球形零件应在焊接前进行涂层。总体，具有高精度夹具和掩膜技术的反应溅射，为现代动力总成燃料系统带来了最佳的整体性能。考虑到涂层特性（高度，宽度，厚度，插入距离）优化了夹具设计，并用磁铁板将球形零件固定在夹具上。通过几次试验确定了涂层材料和工艺。总之，开发了PVD + PACVD涂层零件，并确保了高质量，均匀性和30,000次插入量的涂层。涂层零件比非涂层零件至少耐用100％。通过几次试验确定了涂层材料和工艺。总之，开发了PVD + PACVD涂层零件，并确保了高质量，均匀性和30,000次插入量的涂层。涂层零件比非涂层零件至少耐用100％。通过几次试验确定了涂层材料和工艺。总之，开发了PVD + PACVD涂层零件，并确保了高质量，均匀性和30,000次插入量的涂层。涂层零件比非涂层零件至少耐用100％。