Resistant to abrasive wear, micro-vibration wear, and corrosion from acidic solutions. Its wear resistance and corrosion resistance are slightly lower than 13%, and it can withstand weak acid corrosion. It has good polishability and resistance to fiber wear. Used for pump components, shaft sleeves, mechanical seals, and household frying pans. Operating temperature <520°C.

Product Performance

Alumina-Titania (Al2O3-TiO2) composite powder is a combination of TiO2 powder and Al2O3 powder in specific proportions, including several varieties such as Al2O3 - 3% TiO2, Al2O3 - 13% TiO2, Al2O3 - 20% TiO2, Al2O3 - 40% TiO2, and Al2O3 - 50% TiO2, with a melting point around 2000°C.

TiO2 has a lower melting point than Al2O3 and a lower Mohs hardness value. Molten TiO2 exhibits better wettability to metal substrates such as steel, titanium, and aluminum compared to molten Al2O3, resulting in superior bonding performance.

(1) As the TiO₂ content in the Al₂O₃-TiO₂ composite powder increases, the porosity of the sprayed coating decreases, and its density increases.

(2) The addition of the TiO₂ component helps improve the bonding strength between the sprayed Al₂O₃ coating and the substrate material, as well as the cohesive strength among Al₂O₃ particles within the coating, thereby enhancing the mechanical properties of the coating. Therefore, compared with pure Al₂O₃ coatings, Al₂O₃ coatings containing TiO₂ exhibit better toughness and higher resistance to impact loads.

(3) Due to the reduction effect of TiO₂ in the high-temperature plasma spray jet, TiO₂ coatings exhibit semiconductor properties. In Al₂O₃-TiO₂ composite powders, when the TiO₂ content exceeds 20%, the Al₂O₃-TiO₂ coating demonstrates semiconductor characteristics.

(4) The Al₂O₃-TiO₂ composite powder coating containing more than 13% TiO₂ exhibits a black surface and, unlike pure Al₂O₃ coatings with low thermal emissivity, demonstrates high thermal emissivity characteristics.

(5) Due to the presence of TiO2 components, the as-sprayed Al2O3-TiO2 coating exhibits a uniform and fine surface morphology with an orange-peel texture. With slight polishing, it can achieve relatively ideal fiber wear resistance properties.

After grinding, fine grinding, lapping, and polishing, the sprayed Al2O3-TiO2 coating can achieve a mirror-like surface roughness.

Product Applications

1. In the metal drawing industry, such as the production of steel wire, steel wire rope, and wire cables, a large number of wire guide wheels, capstans, and rollers are used.

2. Papermaking and printing press rollers.

3. Oil-throwing ring for high-speed wire rod mill in the steel industry.

4. Automotive parts and agricultural machinery components, among others.

5. Wear-resistant parts for tobacco machinery.