Preparation method of titanium carbide-based multi-ceramic coating

Abstract

The invention discloses a preparation method of a titanium carbide-based multi-ceramic coating, which comprises the following steps: 1) putting a powdered agglomerate metal electrode and a workpiece electrode into kerosene; 2) connecting the anode of a pulse power source with the powdered agglomerate metal electrode, and connecting the cathode of the pulse power source with the workpiece electrode; and 3) switching on the pulse power source to enable Ti and other metal Me ions released by discharging of the powdered agglomerate metal electrode in liquid-phase media to carry out electrochemical reaction with C ions ionized from the kerosene under the action of plasma to synthesize the titanium carbide-based multi-ceramic coating, and depositing the titanium carbide-based multi-ceramic coating on the surface of the workpiece electrode, wherein the powdered agglomerate metal electrode is prepared by carrying out compression molding on the powder in which the weight ratio of Ti to Me is 70-90:30-10 and then carrying out high-temperature sintering in a vacuum sintering furnace, wherein Me is Al, W or Zr. The invention has the advantages of uneven components of a strengthened layer, high process stability, no need of large film coating devices, no need of vacuumization, and low film coating cost.

Description

technical field [0001] The invention relates to a preparation method of a titanium carbide-based multi-element ceramic coating, which belongs to the preparation method of a high wear resistance ceramic coating. Background technique [0002] The preparation of wear-resistant coatings is the most active research field in the current material surface technology. Multi-component ceramic coatings prepared by various techniques have high wear resistance, hardness and corrosion resistance, and are widely used in tooling, mold and material decoration. The main characteristics that multi-layer coatings have in tooling compared to single coatings are: [0003] (1) The multi-component coating has a higher hardness than a single coating; [0004] (2) The multi-layer coating has higher heat resistance and high temperature oxidation resistance than a single coating; [0005] (3) The multi-layer coating has a lower friction coefficient than a single coating, and the wear resistance is m...

AI Technical Summary

Problems solved by technology

[0009] At present, the preparation methods of metal carbon and nitrogen compound multi-component ceramic coatings mainly include: chemical vapor deposition (CVD), physical vapor deposition (PVD), self-propagating high-temperature synthesis (SHS) and other technologies. When these technologies are used to form metal-multi-component ceramics For surface composite materials, due to the high deposition temperature (generally, PVD is higher than 500°C, CVD is higher than 800°C, and SHS is higher than 800°C), their application range is limited to a certain extent. Therefore, low temperature deposition technology causes Due to widespread interest in the world, people urgently need to seek a technology for low-temperature deposition of multi-component ceramic coatings to make up for the shortcomings of the above-mentioned technical methods.

Images