在火花等离子体烧结过程中防止碳污染
Michal Sakajio1, Gennady E Shter1, Meirav Mann-Lahav1
1The Wolfson Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa, 3200003, Israel.
ACS applied materials & interfaces
|July 28, 2023
概括
在火花等离子体烧结 (SPS) 过程中保护透明YAG陶免受碳污染至关重要. (Ta) 薄膜有效防止碳扩散,提高透明度,并使新的陶金属粘合策略成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 陶工程 陶工程
- 先进制造先进制造 制造先进制造
背景情况:
- 在火花等离子烧结 (SPS) 中的石墨模具会导致碳污染,降低材料性能,特别是在透明陶中.
- 控制碳扩散对于获得高质量的烧结材料至关重要.
研究的目的:
- 调查 (Mo) 和 (Ta) 薄膜作为在YAG陶的SPS过程中防止碳污染的保护性屏障的有效性.
- 分析这些保护所引起的微观结构和光学性能变化.
- 探索一种用于将氧化陶与金属结合的新方法.
主要方法:
- 使用SPS与Mo和Ta薄膜作为屏障,制备透明的亚 (YAG) 陶.
- 对薄膜和YAG陶之间的接口进行分析.
- 烧结陶的微观结构特征和光学性能评估.
主要成果:
- (Ta) 薄膜形成了一层YTaO4-Al2O3的环氧反应层,有效抑制碳扩散,改善YAG的透明度.
- (Mo) 薄膜允许碳扩散,导致微观结构不均,但很容易被移除.
- 多层Ta-Mo屏障显示出由于Ta的扩散阻断特性,具有足够的Ta厚度 (>~100μm) 的增强保护.
- 莫和塔方法都实现了类似的光学性能.
结论:
- 坦坦薄膜在SPS加工的YAG陶中提供了有效的屏障,防止碳污染,提高了透明度.
- 这项研究提出了一种新的方法,使用Ta介层将氧化陶与金属结合起来.
- 这些发现表明,在SPS衍生材料中防止碳污染的可行策略.
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