W-Y2O3 composites obtained by mechanical alloying and sintering

Antolak‐Dudka, Anna; Oleszak, D.; Zieliński, R.; Kulik, T.

doi:10.1016/j.apt.2020.12.017

Cited by 13 publications

(1 citation statement)

References 26 publications

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“…Figure 5 a shows the smooth ablated surface of W-1.5 Y alloy, which is consistent with the results in Figure 4 b. However, many pores are distributed on the surface layer, which may be attributed to the porous WO 3 and dissolution of Y 2 O 3 in the WO 3 melt during the high-temperature ablation process [ 35 , 36 ]. The low melting point of WO 3 and porous structure lead to the poor performance of surface layer of W-1.5 Y in resisting oxidation and high-temperature ablation.…”

Section: Resultssupporting

confidence: 81%

Microstructure and High-Temperature Ablation Behaviour of Hafnium-Doped Tungsten-Yttrium Alloys

Huang

Zhang

et al. 2023

Materials

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W is a widely used refractory metal with ultra-high melting point up to 3410 °C. However, its applications are limited by poor ablation resistance under high-temperature flame and air flow, which is crucial for aerospace vehicles. To improve the ablation resistance of W under extreme conditions, W-Y alloys doped with different Hf mass fractions (0, 10, 20, and 30) were prepared using the fast hot pressing sintering method. Microstructure and ablation behaviours at 2000 °C were investigated. Results showed that adding an appropriate amount of Hf improved the properties of the W-Y alloy evidently. In particular, the hardness of the alloy increased with the increased content of Hf. The formation of the HfO2 layer on the surface during ablation decreased the mass and linear ablation rates, indicating enhanced ablation resistance. However, excessive Hf addition will result in crack behaviour during ablation. With a Hf content of 20 wt.%, the alloy exhibited high stability and an excellent ablation resistance.

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Section: Resultssupporting

confidence: 81%