一种Ni3Al基单晶合金及其制备方法和应用、夹具及其制备方法和应用
By using a fixture design with Ni3Al-based single crystal alloy, PtAl coating, and YSZ ceramic layer, the problems of insufficient temperature resistance limit and high cost in high-temperature creep tests were solved, achieving temperature resistance and oxidation resistance above 1220℃.
CN119553369BActive Publication Date: 2026-07-17BEIHANG UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIHANG UNIV
- Filing Date
- 2024-11-28
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing high-temperature alloy fixtures have insufficient temperature resistance limits in creep tests above 1220℃, and high-generation single-crystal alloys are expensive, failing to meet the service requirements of hot-end components of high thrust-to-weight ratio aero engines.
Method used
By using Ni3Al-based single-crystal alloys, adjusting the elemental composition and preparation process, and combining PtAl coating and YSZ ceramic layer fixture design, the temperature resistance of the alloys is improved and the cost is reduced.
Benefits of technology
Long-term service at 1220℃ significantly improves the alloy's temperature resistance and oxidation resistance, reduces production costs, and solves the fixture material requirements for high-temperature creep testing.
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Figure CN119553369B_ABST
Abstract
本发明属于单晶合金技术领域，具体涉及一种Ni3Al基单晶合金及其制备方法和应用、夹具及其制备方法和应用。本发明提供的Ni3Al基单晶合金包括以下质量百分含量的元素组分：7.0～8.3wt.％Al，2.0～3.8wt.％Ta，7.9～9.8wt.％Mo，0.8～1.5wt.％Re和余量Ni。Ni3Al基单晶合金具有良好的耐温性能在1220℃ / 70MPa下的持久寿命大于120h，在1220℃下有效使用寿命不低于1000h。本发明通过提高Al和Ta元素的含量增大单晶合金中γˊ相体积分数，以Mo代Re高错配度合金化设计协同作用，在提高了Ni3Al基单晶合金承温能力的同时，显著降低了合金的成本。
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