Journal
CERAMICS INTERNATIONAL
Volume 46, Issue 11, Pages 18241-18255Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.04.147
Keywords
Nanocomposite functional coating; DLC; Ceramic cutting tool; Tool wear
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Funding
- Russian Science Foundation [18-19-00599]
- Russian Science Foundation [18-19-00599] Funding Source: Russian Science Foundation
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The article discusses the specific features of the deposition of (Cr,Al,Si)N-(DLC-Si) composite coatings on the (Al2O3 + TiC) ceramic substrate and studies the performance properties of ceramic cutting tools with the above coatings. Three coating options were considered, including a (Cr,Al,Si)N transition layer and a DLC-Si wear-resistant layer with various options of Si content. The coating structure was investigated using scanning electron microscopy, transmission electron microscopy (TEM), and high-resolution TEM. The crystalline structures of the coatings were studied using the selected-area diffraction pattern. The studies substantiated the need for the application of a (Cr,Al,Si)N transition layer between a ceramic substrate and the DLC-Si coating, and the influence of the Si content on the coating properties was also considered. The cutting properties of tools with the DLC-Si coatings of various structures were studied during the turning of AISI 52100 (HRC 56-58) hardened steel. The studies also focused on the wear pattern of uncoated tools and tools with the studied coatings. The application of the (Cr,Al,Si)N-(DLC-Si) coating changes the wear pattern and can prolong the life of a ceramic cutting tool.
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