A novel approach of deposition for uniform diamond films on circular saw blades

Abstract

Uniform diamond films are highly desirable for cutting industries, due to their high performance and long lifetime used on cutting tools. Nevertheless, they are difficult to obtain on cutting tools with complicated shapes, greatly limiting the applications of diamond films. In this study, a novel approach of deposition for uniform diamond films is proposed, on circular saw blades made of cemented carbide using reflectors of brass sheets. Diamond films are deposited using hot filament chemical vapor deposition (HFCVD). A novel concave structure of brass sheets is designed and fabricated, improving the distribution of temperature field, and overcoming the disadvantages of the conventional HFCVD systems. This increases the energy efficiency of use without changing the structure and increasing the cost of HFCVD. The grains are refined and the intensities of diamond peaks are strengthened obviously, which is confirmed by scanning electron microscopy and Raman spectra respectively.

Computer Simulation of Temperature Parameter for Diamond Formation by Using Hot-Filament Chemical Vapor Deposition

“…This can produce a non-uniform diamond deposition. To solve this problem, the worktable was rotated [17] at a speed of 6 rpm during deposition, to improve the distribution of the temperature field. Analysis of the deposited diamond was performed using FE-SEM (S-4800, Hitachi, Ibaraki, Japan) and the size, morphology, and density of the deposited diamond were analyzed.…”

“…This can produce a non-uniform diamond deposition. To solve this problem, the worktable was rotated [17] at a speed of 6 rpm during deposition, to improve the distribution of the temperature field. The inside of the chamber could be seen through the quartz glass outside the chamber.…”