Perspectives on Developing Burn Resistant Titanium Based Coatings-An Opportunity for Cold Spraying.

Area of Science:

• Materials Science
• Aerospace Engineering
• Surface Engineering

Background:

• Titanium alloys are vital for lightweight aerospace components but prone to high-temperature combustion.
• Existing burn-resistant titanium alloys (Ti-V-Cr, Ti-Cu) are costly and have lower specific strength.
• Surface coatings offer a cost-effective method to enhance titanium alloy burn resistance without compromising base material properties.

Purpose of the Study:

• To review current burn-resistant surface technologies for titanium alloys.
• To propose a novel bimetallic coating method using cold spray and low-temperature heat treatment.
• To address the spontaneous combustion issue in aerospace engine titanium alloy parts.

Main Methods:

• Review of existing literature on titanium alloy burn resistance and surface treatments.
• Proposal of a bimetallic coating strategy utilizing cold spray technology.
• Integration of low-temperature heat treatment with cold spray deposition.

Main Results:

• Cold spray technology avoids defects and deformation common in conventional methods like laser cladding.
• The proposed bimetallic coating method shows potential for solving spontaneous combustion issues.
• The developed strategy can guide the creation of advanced metal matrix composite coatings.

Conclusions:

• Cold spray and low-temperature heat treatment offer a promising approach for enhancing titanium alloy burn resistance.
• This method provides a cost-effective solution for improving the safety of aerospace engine components.
• The findings contribute to the development of next-generation high-performance coatings for demanding applications.