The effectiveness and advantages of zirconia coatings

Zirconia coating is a widely used surface treatment technology in the industrial field, and its effectiveness has been verified in multiple aspects. Firstly, zirconia coatings perform exceptionally well in terms of corrosion resistance. Compared with other coatings, zirconia has excellent oxidation resistance and can effectively resist the erosion of chemical substances and environmental factors, thereby extending the service life of workpieces. This makes zirconia coatings highly favored in industries such as aerospace, automotive and chemical engineering.

Zirconia coatings have also demonstrated excellent results in repairing the surfaces of workpieces. The application of zirconia coating can effectively fill the tiny defects and scratches on the surface of the workpiece, restoring its original smoothness and functionality. This repair capability not only enhances the appearance of the workpiece but also improves its overall performance, reducing the risk of failure caused by surface damage.

2. The wear resistance of zirconia coating is also one of its major advantages. Compared with other coatings, zirconia coatings can still maintain good stability in high-temperature and high-pressure environments and are suitable for various harsh working conditions. This has made the application of zirconia coatings increasingly common in fields such as mechanical parts, tools and molds.

In conclusion, the effectiveness of zirconia coatings in terms of corrosion resistance, surface repair and wear resistance makes them an ideal choice for surface treatment. With the continuous advancement of technology, the application prospects of zirconia coatings will be even broader.

Core performance parameters:

1. High hardness and wear resistance:

At room temperature, the Vickers hardness reaches HV1250, and the Mohs hardness of cubic phase zirconia can reach 9.0, surpassing most metallic materials. 13

The crack energy is absorbed through the phase transformation toughening mechanism (tetragonal phase - monoclinic phase transformation), which enhances the fracture toughness to 6-8 MPa·m', significantly outperforming traditional ceramic materials. 2 4

2. High-temperature stability

The melting point is as high as 2715℃, and it remains structurally stable even when used for a long time below 1300℃

Typical thermal barrier coatings (such as YSZ) have a thermal expansion coefficient of 10.5 × 10 ⁻ ⁶ /°C(room temperature -1200 °C), and have good compatibility with high-temperature alloy substrates. 

3. Chemical stability

Resistant to acid and alkali corrosion (except hydrofluoric acid and concentrated sulfuric acid), the ion exudation rate in biological fluids is less than 0.01ug/cm*-day. 

The conductivity of oxygen ions can reach 0.1S/cm(at 800℃), making it suitable for solid oxide fuel cell electrolytes. 

4. Heat insulation performance

The thermal conductivity is as low as 2.3 W/(m·K)(at 800℃), which is 60% lower than that of nickel-based alloys, and can reduce the base temperature by 100-300℃.