温度和压力对 (TiB + TiC + Y2O3) /α-Ti复合材料的爬行行为的影响
Xicheng Wang1,2, Yunfei Zheng1,2, Shiwei Han1,2
1National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel, Switzerland)
|January 11, 2025
概括
这项研究研究了一种用TiB,TiC和Y2O3.3增强的矩阵复合材料. 较高的温度显著减少了爬行寿命,增加了爬行速率,主要是由于脱位运动和β相溶解.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 复合材料 复合材料 复合材料
背景情况:
- 矩阵复合材料为高温应用提供了先进的性能.
- 了解爬行行为对于材料在压力和热量下表现至关重要.
- 混合增强可以增强机械性能,但需要详细的研究.
研究的目的:
- 研究一个 (TiB + TiC + Y2O3) /α-Ti复合物的爬行行为和微观结构演变.
- 为了确定温度和应力对复合材料爬行性能的影响.
- 在爬行条件下阐明加强机制和故障模式.
主要方法:
- 复合材料的制备使用诱导融头骨.
- 作为造和爬行测试样本的微结构分析.
- 在各种温度 (650°C,700°C) 和应力下进行爬行测试.
主要成果:
- 作为造微观结构的特点是一个篮子织物结构与α片,β阶段,和equiaxed α阶段.
- 爬行寿命显著下降,稳定状态爬行率从650°C到700°C增加了1-2个数量级.
- 脱位运动主导了爬行,TiB和TiC通过阻碍脱位提供了协同增强. 观察到加速β阶段溶解和在强化物附近的化物沉.
结论:
- 复合材料的爬行性能对温度和应力敏感,β相溶解是性能降解的关键因素.
- 来自TiB和TiC的协同增强,以及化物沉,增强了爬行阻力.
- 这些发现为开发先进的混合增强矩阵复合材料提供了指导.
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