Silicon nano-carbide in strengthening and ceramic technologies

Abstract

Abstract. Technological advantages and conditions of new quality assurance of coatings and products, provided by silicon nano-carbide, have been ascertained in the course of composite electrodeposition of coatings, structural ceramics patterning, and surface hardening of steels via electro-explosive alloying. Silicon nano-carbide has been recommended to be used as a component of wear and corrosion resistant chromium carbide electrodeposited coatings, which can be operated at high temperatures and used for strengthening tools and equipment including those with a complex microrelief of functional surfaces. Silicon nano-carbide as a component of composite "silicon carbide -boron -carbon" can be applied to produce ceramic half products via solid phase sintering in argon under pressure of 0.1 МPа and temperature 2273 К. Application of silicon nano-carbide in technology of tool steel surface hardening via electroexplosive alloying ensures obtaining of a high micro-hard, wear and heat resistant shielding layer which is about 20 µm deep. IntroductionSilicon carbide production is one of the most important in the structure of contemporary metallurgy. It is a combination of extraordinary thermo physical, mechanical, physical and technical properties of silicon carbide that makes it the unique material for numerous branches of engineering and predetermines such basic applications as couplant materials, ceramics, composite materials, and coatings. World production of silicon carbide is approximately 800 thousand tons annually. The main spheres of silicon carbide application are metallurgy (about 45 % of world demand), abrasive materials production (up to 30 %), and refractory materials (up to 25 %). Product markets of silicon-carbide powder materials: micronized powder with maximum 1 µm particles (so called micronized carbide) used for ceramics and nano-powder with maximum 100 nm particles (so called nano-carbide) used for high quality structural and impact resistant ceramics and galvanics are small-scale in terms of real volume (maximum 1%) but intensively expanding, they also have high money measure. Introduction of silicon carbide in form of nano-carbide opens new horizons of its application, including surface and threedimensional modifying metal alloys and polymers, developing special components of paints etc. [1,2]. Manufacturers of micronized carbide are enterprises of world leader companies "Saint -Gobian" and "Exolon -ESK". Among nano-carbide manufacturers there are research and production companies "Tokyo Tekko Co" (Japan), "Hefei Kaier Nanotechnology  Development Ltd. Co" (China), "NEOMAT Cо" (Latvia) etc.

Anti-Bacterial Properties and Biocompatibility of Novel SiC Coating for Dental Ceramic

“…Following the SiO 2 deposition, methane (CH 4 ) and silane (SiH 4 ) were the precursors used for silicon carbide deposition. The deposition temperature for both films was 300 • C, and the deposition rates for SiO 2 was 330 Å/min and for SiC was 170 Å/min [14].…”

“…Although the majority of these approaches have used methods involving the bulk system, use of thin films can offer an easier avenue to maintaining the integrity of the restoration while grafting unique properties to selective areas where the film is applied. One of the novel thin films of interest is silicon carbide due to the ease of deposition, lack of reactivity to the oral environment, and high strength [11][12][13][14][15] of this material. Silicon carbide has found significant success in two major areas: semiconductors and ceramics.…”

“…In recent reports, the development and optimization of SiC-based coatings to minimize surface corrosion and wear on glass ceramic veneers has been demonstrated [14,21]. Hsu et al [21] reported that SiC-coated dental ceramics demonstrated a significant reduction in corrosion when placed in caustic environments that represent the extreme conditions of the oral cavity.…”

Demonstration of a SiC Protective Coating for Titanium Implants

“…Another possible alternative to direct surface modification is coating the titanium implant with a protective material to reduce corrosion effects and their associated side effects. Out of many potential materials that could protect titanium from corrosion, silicon carbide (SiC) seems promising due to this material’s high strength, lack of reactivity to the oral environment, and ease of deposition [ 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ]. Using SiC as a protective coating has proven to be effective for glass-ceramics used for fixed dental prostheses and significantly reduced the effects of corrosion [ 54 , 56 ].…”

Electrical Discharge Machining of Silicon Carbide Ceramic of Plane Processing

“…It is widely used in water pumps, heat exchangers, bearings, and space telescopes [1,2]. It possesses excellent properties, such as oxidation resistance, high mechanical strength at elevated temperature, high hardness, high corrosion resistance, high thermal conductivity, and high thermal shock resistance [3][4][5][6]. However, SiC ceramics have grinding difficulties due to their hard and brittle features.…”