Fabrication of SiC/diamond composite coatings by electrophoretic deposition and chemical vapor deposition

Abstract

In this research, SiC/diamond composite coatings were fabricated by a novel procedure that consisted of the electrophoretic deposition (EPD) of diamond particles onto graphite substrates followed by chemical vapor deposition (CVD) of SiC. Various concentrations of MgCl2 were employed to increase the deposition rate and uniformity of the deposits during the EPD process by giving a positive charge to diamond particles. The CVD of SiC was found to have a tightly connected diamond‐graphite interface and spherical texture. With higher weight fraction of diamond particles deposits, the wear of steel ball increased, while the wear of SiC coating decreased.

Extended studies on surface‐treated graphite vis‐à‐vis its application in high alumina refractory castable

“…The researchers mostly adopted the surface modification of graphite by a suitable coating on graphite. In this regard, molten salt syntheses, gas state reaction, CVD coatings, atomic layer deposition, sol‐gel synthesis of thin film are noteworthy . In this pursuit of achieving high‐tech and heavy‐duty ceramic‐carbon monoliths for steel plants, our ideal choice was to develop coated graphite by sol‐gel route.…”

“…In this regard, molten salt syntheses, gas state reaction, CVD coatings, atomic layer deposition, sol-gel synthesis of thin film are noteworthy. [13][14][15][16][17][18] In this pursuit of achieving hightech and heavy-duty ceramic-carbon monoliths for steel plants, our ideal choice was to develop coated graphite by sol-gel route. Taking the clue that hydrophilic thin film on graphite can assist fabrication and carbon protection, a cost-competent nanostructured ceramic oxide coated graphite for monolithic refractories has already been reported.…”

MPCVD diamond-SiC composite stacks for enhanced thermal performance: a concise review

“…Diamond-silicon carbide (SiC) composites are composed of two wide-bandgap materials, each with excellent thermal, electronic, optical, and mechanical properties, are widely applied in many important applications, such as the superhard cutting tools and protective layers, [13][14][15][16] the adjustable heat spreaders for high-power electronic devices, 17,18) field electron emission device, 19) selective protein absorbers in medical applications and so on. 20) Traditional methods for preparing diamond-SiC composites include, sintering 21,22) and liquid/vapor phase infiltration, 23,24) etc.…”

Residual thermal stresses prediction for CVD coating/substrate system based on a numerical model

“…Chemical vapor deposition ceramic coatings, like SiC coating, Si 3 N 4 coating et al, are advanced and promising materials due to their remarkable properties: chemical inertness, high temperature resistance, high stiffness, hardness and toughness, good optical properties, et al Meanwhile the ceramic coating produced by chemical vapor deposition (CVD) as a protection layer has been widely applied in aerospace and semiconductor fields recently. In high temperature, the CVD ceramic coating can effectively prevent oxygen from oxidizing and deteriorating the substrate.…”