Study of the Influence of Silicon-Containing Diamond-like Carbon Coatings on the Wear Resistance of SiAlON Tool Ceramics

DLC coatings have low adhesive bond strength with the substrate and a high level of residual stresses. This paper is devoted to researching complex characteristics DLC-Si coating deposited on samples SiAlON ceramics intermediate (CrAlSi)N pre-formed improve employing vacuum-plasma spraying. were formed by chemical vapor deposition in gas mixture acetylene, argon, tetramethylsilane supplied through multichannel purge system controlling volume 1, 4, 7, 10%. The (CrAlSi)N/DLC-Si different silicon content layer subjected XPS EDX analyses. Tribological tests carried out under conditions high-temperature heating at 800C. nanohardness elasticity modulus rational Si-content 4.1% wt. 26 ± 1.5 GPa 238 6 GPa, correspondingly. composition was cutters made tested high-speed machining aircraft nickel-chromium alloy compared uncoated DLC-coated samples. average operating time (wear resistance) (CrAlSi)N/DLC-Si(4.1% wt.)-coated end mills before reaching accepted failure criterion 15.5 min when it 10.5 for original cutters.