Influence of the non-metal species on the oxidation kinetics of Hf, HfN, HfC, and HfB2 coatings

被引：33

作者：

Glechner, T. ^{[1
]}

Hudak, O. E. ^{[1
]}

Wojcik, T. ^{[1
]}

Haager, L. ^{[2
]}

Bohrn, F. ^{[2
]}

Hutter, H. ^{[2
]}

Hunold, O. ^{[3
]}

Ramm, J. ^{[3
]}

Kolozsvari, S. ^{[4
]}

Pitthan, E. ^{[5
]}

Primetzhofer, D. ^{[5
]}

Riedl, H. ^{[1
,6
]}

机构：

[1] TU Wien, Christian Doppler Lab Surface Engn High Performan, Vienna, Austria

[2] TU Wien, Inst Chem Technol & Analyt, A-1060 Vienna, Austria

[3] Oerlikon Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein

[4] Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany

[5] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[6] TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria

来源：

MATERIALS & DESIGN | 2021年 / 211卷

关键词：

Thin films; Borides; Oxide-film growth kinetics; Oxidation; Hafnium; TITANIUM ALUMINUM NITRIDE; TEMPERATURE; RESISTANCE; CARBIDES; BEHAVIOR; FILMS;

D O I：

10.1016/j.matdes.2021.110136

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of the non-metal species on the oxidation resistance of transition metal ceramic based thin films is still unclear. For this purpose, we thoroughly investigated the oxide scale formation of a metal (Hf), carbide (HFC0.96), nitride (HfB1.5), and boride (HfB2.3) coating grown by physical vapor deposition. The non-metal species decisively affect the onset temperature of oxidation, ranging between 550 degrees C for HfC0.96 to 840 degrees C for HfN1.5. HfB2.3 and HfN1.5 obtain the slowest oxide scale kinetic following a parabolic law with k(p) values of 4.97.10(-10) and 5.66.10(-11) kg(2) m(-4) s(-1) at 840 degrees C, respectively. A characteristic feature for the oxide scale on Hf coatings, is a columnar morphology and a substantial oxygen inward diffusion. HfC0.96 reveals an ineffective oxycarbide based scale, whereas HfN(1.5 )features a scale with globular HfO2 grains. HfB(2.3 )exhibits a layered scale with a porous boron rich region on top, followed by a highly dense and crystalline HfO2 beneath. Furthermore, HfB(2.3 )presents a hardness of 47.7 +/- 2.7 GPa next to an exceptional low inward diffusion of oxygen during oxidation. This study showcases the strong influence of the non-metallic bonding partner despite the same metallic basis, as well as the huge potential for HfB2 based coatings also for oxidative environments. (C) 2021 Published by Elsevier Ltd.

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页数：12