一步真空反应烧结在Ta12W合金上制备（Zr,Hf）B2-(Hf,Zr)Si-HfCrSi2/TaSi2复合涂层的原位形成机理及1700℃和1800℃等温氧化行为

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-05-31 DOI:10.1016/j.jeurceramsoc.2025.117584

Tingyang Wang , Xin Wang , Tao Yang , Shaopeng Wang

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引用次数: 0

摘要

具有优异力学性能的Ta-W合金在1700℃以上会因“灾难性”氧化而迅速失效。在Ta12W合金上，通过一步真空反应烧结，原位制备了一种新型（Zr,Hf）B2-(Hf,Zr)Si-HfCrSi2/TaSi2涂层。该涂层分别在1700℃氧化5 h和1800℃氧化60 min后保持完整。在1700℃和1800℃下形成了以（Hf,Zr）SiO4和（Hf,Zr）6Ta2O17为主要成分的Ta2O5(TaO2)-HfO2-ZrO2-B2O3-SiO2玻璃的氧化鳞片。复合氧化垢可以防止Cr2O3在1700℃进一步氧化。此外，在玻璃玻璃中沉淀的是微纳米大小的TaO2颗粒，而不是Ta2O5。

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In-situ formation mechanism and isothermal oxidation behaviors at 1700℃ and 1800℃ of (Zr,Hf)B2-(Hf,Zr)Si-HfCrSi2/TaSi2 composite coating prepared on Ta12W alloy by one-step vacuum reaction sintering

Ta-W alloys with excellent mechanical properties above 1700℃ can rapidly fail due to “catastrophic” oxidation. In this investigation, a novel (Zr,Hf)B₂-(Hf,Zr)Si-HfCrSi₂/TaSi₂ coating was in-situ prepared via one-step vacuum reaction sintering on the Ta12W alloy. This coating remained intact after being respectively oxidized at 1700°C for 5 h and at 1800°C for 60 min. Oxide scales primarily composed of Ta₂O₅(TaO₂)-HfO₂-ZrO₂-B₂O₃-SiO₂ glass with (Hf,Zr)SiO₄ and (Hf,Zr)₆Ta₂O₁₇ at 1700°C and with (Hf,Zr)₆Ta₂O₁₇ at 1800°C were formed. The composite oxide scale could prevent the further oxidation of Cr₂O₃ at 1700℃. Additionally, micro-nano sized TaO₂ particles rather than Ta₂O₅ precipitated within the vitreous glass.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.