Micro-crack self-repairing TC21 titanium alloy material and preparation method thereof
By introducing high-temperature resistant TiN ceramic core-shell microcapsules and a three-stage densification process into TC21 titanium alloy, the problem of microcrack propagation in TC21 titanium alloy has been solved, achieving self-healing and high strength and toughness. This breaks the monopoly of high-end self-healing aerospace materials and is suitable for a variety of military equipment.
CN122147137APending Publication Date: 2026-06-05张恒
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 张恒
- Filing Date
- 2026-04-14
- Publication Date
- 2026-06-05
Abstract
The application discloses a kind of microcrack self-repairing TC21 titanium alloy material and preparation method thereof, belong to aerospace and military special titanium alloy material technical field.The material is with domestic TC21 titanium alloy gas atomization powder as matrix, built-in TiN ceramic shell high-temperature resistant core-shell structure self-repairing microcapsule, cooperate SLM additive forming and three-stage densification process preparation is formed;Microcrack can be spontaneously filled healing in service process, microcrack repair rate is greater than or equal to 95%, material density is greater than or equal to 99.99%, room temperature fatigue life is more than 200% than conventional SLM forming TC21 titanium alloy.The application breaks the core short board that high-end military titanium alloy structural part is prone to fatigue fracture, short service life, raw material and process 100% domestic self-controlling, can be widely applied to armored vehicle load-bearing structure, gun barrel, armed helicopter load-bearing component and other military scenes.
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