Title: Influence of substrate bias on performance of diamond coating on WC cutting inserts for machining of aluminium by HFCVD process
Authors: Dilip Kumar Sahu; Saroj Kumar Sarangi; Kakarla Udaya Sri
Addresses: Mechanical Engineering Department, KG Reddy College of Engineering and Technology, Moinabad, 501504, R.R. Dist., Telangana, India ' Mechanical Engineering Department, VSSUT Burla, Sambalpur, 768018, Odisha, India ' Mechanical Engineering Department, KG Reddy College of Engineering and Technology, Moinabad, 501504, R.R. Dist., Telangana, India
Abstract: The most important factors during deposition on different carbide base cutting tool inserts by using hot filament chemical vapour deposition (HFCVD) method are nucleation and growth of diamond. The negative dc biasing is the most outstanding technique in HFCVD method for improving the nucleation on the substrate surface. In the present investigation, the main objective is to analyse the influence of bias voltage on the WC substrate for nucleation, growth, adhesion and quality of diamond coating along with evaluation of machining performance in dry environment. Finally it has been confirmed that higher nucleation density including good quality diamond coatings along with reduced cutting force and better work surface finish were achieved under a definite reaction pressure with negative substrate bias.
Keywords: nucleation; coating; substrate bias; adhesion.
International Journal of Materials Engineering Innovation, 2020 Vol.11 No.4, pp.293 - 308
Received: 26 Nov 2019
Accepted: 25 Mar 2020
Published online: 04 Jan 2021 *