Affiliation:
1. State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Abstract
Tungsten and its alloys are widely recognized as key components in high-temperature environments. In this study, self-passivating W-Si-xY alloys with varying Y content were prepared using mechanical alloying (MA) and spark plasma sintering (SPS). The synergistic effects of Y content and milling time on the microstructures and oxidation resistance of the alloys were revealed. This study found that the oxidation resistance of the alloys increased as the Y content increased. However, the effect of milling time on oxidation resistance was complex. For W-Si-xY alloys with low Y content (0Y and 2Y), the oxidation resistance decreased with increasing milling time. In contrast, for W-Si-xY alloys with high Y content (4Y and 6Y), the oxidation resistance increased with increasing milling time. This enhanced oxidation resistance is due to the microstructural changes in the protective composite layer, including the size and distribution of W5Si3, Y2Si2O7 aggregates, and W-Y-O melt. The thickness of the oxide layer on the W-Si-6Y alloy after being oxidized at 1000 °C for 2 h was only 70.7 μm, demonstrating its superior oxidation resistance.
Funder
ational MCF Energy R&D Program
State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology
Subject
General Materials Science,Metals and Alloys
Reference30 articles.
1. Influence of ZrC content on the elevated temperature tensile properties of ZrCp/W composites;Wang;Mater. Sci. Eng. A,2011
2. High-temperature strength of refractory metals, alloys and composite materials based on them;Kharchenko;Strength Mater.,2012
3. Research Development of Refractory Metal Materials Used in the Field of Aerospace;Zheng;Rare Met. Mater. Eng.,2011
4. Materials for bullet cores;Kolmakov;Adv. Mater. Technol.,2021
5. Impact behavior and ballistic efficiency of armor-piercing projectiles with tool steel cores;Benedetto;Int. J. Impact Eng.,2018