Oxidation Behavior of Nb-Coated Zirconium Diboride

Jan E. Förster; William Fahrenholtz; Gregory E. Hilmas; Ravisankar Naraparaju

doi:10.1016/j.jeurceramsoc.2023.04.029

Oxidation Behavior of Nb-Coated Zirconium Diboride

Jan E. Förster
, William Fahrenholtz
, Gregory E. Hilmas
, Ravisankar Naraparaju

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Metallic Nb-Coatings Were Deposited on Top of ZrB ₂ by Means of Magnetron Sputtering to Improve its Oxidation Resistance. High Temperature Oxidation Tests Have Revealed that the Metallic Nb-Coatings Lead to the Formation of a Dense Solid and Protective Reaction Zone in Addition to a More Stable B ₂ O ₃ Liquid Solution at the Surface. Compared to Baseline ZrB ₂ , a Reduction in the Oxidation Kinetics, as Well as the Thickness of the Porous Zirconia Layer by 71%, Has Been Achieved with the Help of Nb-Coatings. a Liquid Phase Sintering by Molten Nb ₂ O ₅ Mechanism Was Responsible for the Formation of the Dense Reaction Zone under the Boria Layer, Resulting in the Improved Oxidation Resistance. Furthermore, the Experiments Revealed the Need for an Annealing Process of Nb-Coated Specimens, in Vacuum, to Improve the Adhesion of the Coatings with ZrB ₂ and to Avoid Spallation during Oxidation.

Original language	American English
Pages (from-to)	5174-5182
Number of pages	9
Journal	Journal of the European Ceramic Society
Volume	43
Issue number	12
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2023.04.029
State	Published - Jan 1 2023

Keywords

Niobium coatings
Oxidation behavior
Thermochemical reactions
ZrB 2

Disciplines

Ceramic Materials
Materials Science and Engineering

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10.1016/j.jeurceramsoc.2023.04.029License: CC BY

Oxidation Behavior of Nb-Coated Zirconium DiborideFinal published version, 8.09 MBLicense: CC BY

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title = "Oxidation Behavior of Nb-Coated Zirconium Diboride",

abstract = " Metallic Nb-Coatings Were Deposited on Top of ZrB 2 by Means of Magnetron Sputtering to Improve its Oxidation Resistance. High Temperature Oxidation Tests Have Revealed that the Metallic Nb-Coatings Lead to the Formation of a Dense Solid and Protective Reaction Zone in Addition to a More Stable B 2 O 3 Liquid Solution at the Surface. Compared to Baseline ZrB 2 , a Reduction in the Oxidation Kinetics, as Well as the Thickness of the Porous Zirconia Layer by 71\%, Has Been Achieved with the Help of Nb-Coatings. a Liquid Phase Sintering by Molten Nb 2 O 5 Mechanism Was Responsible for the Formation of the Dense Reaction Zone under the Boria Layer, Resulting in the Improved Oxidation Resistance. Furthermore, the Experiments Revealed the Need for an Annealing Process of Nb-Coated Specimens, in Vacuum, to Improve the Adhesion of the Coatings with ZrB 2 and to Avoid Spallation during Oxidation.",

keywords = "Niobium coatings, Oxidation behavior, Thermochemical reactions, ZrB 2",

author = "F{\"o}rster, \{Jan E.\} and William Fahrenholtz and Hilmas, \{Gregory E.\} and Ravisankar Naraparaju",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

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doi = "10.1016/j.jeurceramsoc.2023.04.029",

language = "American English",

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TY - JOUR

T1 - Oxidation Behavior of Nb-Coated Zirconium Diboride

AU - Förster, Jan E.

AU - Fahrenholtz, William

AU - Hilmas, Gregory E.

AU - Naraparaju, Ravisankar

PY - 2023/1/1

Y1 - 2023/1/1

N2 - Metallic Nb-Coatings Were Deposited on Top of ZrB 2 by Means of Magnetron Sputtering to Improve its Oxidation Resistance. High Temperature Oxidation Tests Have Revealed that the Metallic Nb-Coatings Lead to the Formation of a Dense Solid and Protective Reaction Zone in Addition to a More Stable B 2 O 3 Liquid Solution at the Surface. Compared to Baseline ZrB 2 , a Reduction in the Oxidation Kinetics, as Well as the Thickness of the Porous Zirconia Layer by 71%, Has Been Achieved with the Help of Nb-Coatings. a Liquid Phase Sintering by Molten Nb 2 O 5 Mechanism Was Responsible for the Formation of the Dense Reaction Zone under the Boria Layer, Resulting in the Improved Oxidation Resistance. Furthermore, the Experiments Revealed the Need for an Annealing Process of Nb-Coated Specimens, in Vacuum, to Improve the Adhesion of the Coatings with ZrB 2 and to Avoid Spallation during Oxidation.

AB - Metallic Nb-Coatings Were Deposited on Top of ZrB 2 by Means of Magnetron Sputtering to Improve its Oxidation Resistance. High Temperature Oxidation Tests Have Revealed that the Metallic Nb-Coatings Lead to the Formation of a Dense Solid and Protective Reaction Zone in Addition to a More Stable B 2 O 3 Liquid Solution at the Surface. Compared to Baseline ZrB 2 , a Reduction in the Oxidation Kinetics, as Well as the Thickness of the Porous Zirconia Layer by 71%, Has Been Achieved with the Help of Nb-Coatings. a Liquid Phase Sintering by Molten Nb 2 O 5 Mechanism Was Responsible for the Formation of the Dense Reaction Zone under the Boria Layer, Resulting in the Improved Oxidation Resistance. Furthermore, the Experiments Revealed the Need for an Annealing Process of Nb-Coated Specimens, in Vacuum, to Improve the Adhesion of the Coatings with ZrB 2 and to Avoid Spallation during Oxidation.

KW - Niobium coatings

KW - Oxidation behavior

KW - Thermochemical reactions

KW - ZrB 2

UR - https://scholarsmine.mst.edu/matsci_eng_facwork/2944

U2 - 10.1016/j.jeurceramsoc.2023.04.029

DO - 10.1016/j.jeurceramsoc.2023.04.029

M3 - Article

SN - 1873-619X

VL - 43

SP - 5174

EP - 5182

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 12

ER -

Oxidation Behavior of Nb-Coated Zirconium Diboride

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