Low-stress diamond films deposited on stainless steel by a two-step dropped power process in chemical vapor deposition

Abstract

A continuous low-stress diamond film has been prepared on stainless steel by a novel two-step dropped power process using a Cr/CrN/CrTiAlN film as an interlayer. After the interlayer was deposited on the stainless steel, isolated diamond particles were firstly prepared under high power of 1800 W for 10 min in CVD, which has low stress, releasing most of thermal stress. Then, the low power of 1500 W was adopted to form continuous diamond films. The stress is obviously lower than that of the continuous diamond film deposited only in the first CVD process, indicating that the two-step dropped power process surely decreases the internal stress of the film. The blocky microstructure on sandblasted stainless steel and the existence of very small amount of pores in the diamond film are also beneficial to releases the stress.

Diamond Deposition on Iron and Steel Substrates: A Review

“…They show good metallurgical bonding with steel and meanwhile, FeSi inner-layer, formed by SiC dissociation, as the main reason for diffusion barrier. A series interlayers such as Cr/CrN, Al/AlSiN and Cr/CrN/CrTiAlN were studied by Li et al For CVD diamond films on steel substrates [33][34][35]. They found that the multilayer of Cr/CrN/CrTiAlN was efficient to suppress the formation of a crack and its propagation.…”

CVD synthesis of multi-layered polycrystalline diamond films with reduced roughness using time-limited injections of N2 gas

“…One of the ways CVD allows to obtain diamond materials with desired properties is the ability to choose proper growth conditions with t he option of altering them during the CVD process. The latter is widely used for the formation of multi-layered diamond films, which consist of alternating layers of microcrystalline and nanocrystalline diamond (MCD and NCD, accordingly) [31,32]. Such films may serve as hard covers to enhance the performance of various cutting tools [33][34][35][36][37].…”

Effects of NiSO4 Concentration on the Coloring Performance and Corrosion Resistance of the Colored Film on 304 Stainless Steel

“…At present, there are five kinds of coloring methods on stainless steel, which include the organic coating method, vapor deposition method, enamel method, ion deposition nitride or oxide, and stainless steel surface oxidation method [9][10][11]. Among the many coloring methods, the surface oxidation method is the most widely application used because of its simple process and low cost, with the INCO method as the most typical way [12,13].…”