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Title: Enhanced oxidation resistance of (Mo95W5)85Ta10(TiZr)5 refractory multi-principal element alloy up to 1300°C

Abstract

Refractory-metal-based alloys are a potential replacement of current nickel-based superalloys due to their excellent mechanical strength at extremely high temperatures. However, severe oxidation in a high-temperature working environment limits their application. To address this challenge, a two-step coating process (including a Mo precoat and a Si-B pack cementation) was applied to an innovative refractory multi-principal element alloy (RMPEA) (Mo95W5)85Ta10(TiZr)5. The coating is composed of an aluminoborosilica glass layer on top of a RMPEA-Si-B multilayered structure. Here, the coating effectively protects the RMPEA from oxidation in high-temperature environments, as demonstrated by phase-stable operation at 10–20% higher temperatures over state-of-the-art systems without any forced-cooling system. Following an isothermal exposure at 1300 °C, the weight change of the coated sample follows a paralinear kinetics with a minor weight loss of 4.2 mg/cm2 after 50 h. Thermal cycling tests between 1300 °C and room temperature in air resulted in the total weight gain of only 2.6 mg/cm2 after 450 cycles. The coating shows an excellent adherence to the substrate with a boride layer acting as a barrier that maintains the coating integrity. This two-step Mo-Si-B coating method can be adapted to provide environmental resistance to a wide range of RMPEA.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [1]; ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Ames Lab., and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
OSTI Identifier:
1798863
Alternate Identifier(s):
OSTI ID: 1805071
Report Number(s):
IS-J-10,523
Journal ID: ISSN 1359-6454
Grant/Contract Number:  
AC02-07CH11358; WBS 2.1.0.19; 07CH11358; AC02?; AC02–07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 215; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; RMPEA; refractory metal alloy; Mo-Si-B coating; ultra-high temperature; oxidation

Citation Formats

Su, Ranran, Zhang, Hongliang, Ouyang, Gaoyuan, Liu, Longfei, Nachlas, Will, Cui, Jun, Johnson, Duane D., and Perepezko, John H. Enhanced oxidation resistance of (Mo95W5)85Ta10(TiZr)5 refractory multi-principal element alloy up to 1300°C. United States: N. p., 2021. Web. doi:10.1016/j.actamat.2021.117114.
Su, Ranran, Zhang, Hongliang, Ouyang, Gaoyuan, Liu, Longfei, Nachlas, Will, Cui, Jun, Johnson, Duane D., & Perepezko, John H. Enhanced oxidation resistance of (Mo95W5)85Ta10(TiZr)5 refractory multi-principal element alloy up to 1300°C. United States. https://doi.org/10.1016/j.actamat.2021.117114
Su, Ranran, Zhang, Hongliang, Ouyang, Gaoyuan, Liu, Longfei, Nachlas, Will, Cui, Jun, Johnson, Duane D., and Perepezko, John H. Thu . "Enhanced oxidation resistance of (Mo95W5)85Ta10(TiZr)5 refractory multi-principal element alloy up to 1300°C". United States. https://doi.org/10.1016/j.actamat.2021.117114. https://www.osti.gov/servlets/purl/1798863.
@article{osti_1798863,
title = {Enhanced oxidation resistance of (Mo95W5)85Ta10(TiZr)5 refractory multi-principal element alloy up to 1300°C},
author = {Su, Ranran and Zhang, Hongliang and Ouyang, Gaoyuan and Liu, Longfei and Nachlas, Will and Cui, Jun and Johnson, Duane D. and Perepezko, John H.},
abstractNote = {Refractory-metal-based alloys are a potential replacement of current nickel-based superalloys due to their excellent mechanical strength at extremely high temperatures. However, severe oxidation in a high-temperature working environment limits their application. To address this challenge, a two-step coating process (including a Mo precoat and a Si-B pack cementation) was applied to an innovative refractory multi-principal element alloy (RMPEA) (Mo95W5)85Ta10(TiZr)5. The coating is composed of an aluminoborosilica glass layer on top of a RMPEA-Si-B multilayered structure. Here, the coating effectively protects the RMPEA from oxidation in high-temperature environments, as demonstrated by phase-stable operation at 10–20% higher temperatures over state-of-the-art systems without any forced-cooling system. Following an isothermal exposure at 1300 °C, the weight change of the coated sample follows a paralinear kinetics with a minor weight loss of 4.2 mg/cm2 after 50 h. Thermal cycling tests between 1300 °C and room temperature in air resulted in the total weight gain of only 2.6 mg/cm2 after 450 cycles. The coating shows an excellent adherence to the substrate with a boride layer acting as a barrier that maintains the coating integrity. This two-step Mo-Si-B coating method can be adapted to provide environmental resistance to a wide range of RMPEA.},
doi = {10.1016/j.actamat.2021.117114},
journal = {Acta Materialia},
number = ,
volume = 215,
place = {United States},
year = {Thu Jun 24 00:00:00 EDT 2021},
month = {Thu Jun 24 00:00:00 EDT 2021}
}

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