Thermal Spraying: Titanium Alloy Surface Strengthening Technology

titanium alloy in the space application

Titanium and titanium alloys are widely used in aviation, aerospace, marine, chemical and military industries. However, its low hardness, high friction coefficient, poor abrasion resistance, and high temperature and high speed friction and flammability severely limit its further widespread application. Preparing a hard surface protective coating with excellent properties on the surface of a titanium alloy can effectively improve its weak surface properties while maintaining the high strength and light weight characteristics of the base titanium alloy, and meet the special use requirements of some industries.

At present, in the field of titanium alloy surface modification, the commonly used modification materials can be divided into several categories such as metals and ceramics, and there are no fewer than dozens of materials studied. Common surface modification methods of titanium alloys include chemical heat treatment, ion implantation, micro-arc oxidation, electroplating, vapor deposition, thermal spraying, laser surface alloying, and laser cladding.

Thermal spraying technology is one of the important technologies for surface protection and strengthening. The thermal spraying process has high efficiency, simple and flexible operation, and because of the wide temperature range of its heat source, a wide range of coating materials can be sprayed. Common thermal spraying methods include supersonic flame spraying, plasma spraying, arc spraying, deflagration spraying, and oxyacetylene flame spraying.

titanium alloy aviation

The thermal spraying method has been widely used to prepare wear-resistant anticorrosive coatings with a certain density and bonding strength. Thermal spray coatings have an obvious layered structure, and it is easy to generate pores in the coating. Most of the bonding between the coating and the substrate is mechanical, and such bonding strength is generally difficult to meet the service requirements under heavy load conditions.

Stanford Advanced Materials (SAM) Corporation was established in 1994. After decades of unremitting efforts, SAM has made great progress in the fields of thermal spray equipment development, thermal spray materials, thermal spray process development and application. SAM is increasingly becoming a well-known brand in the US thermal spraying industry.

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