Kinetics of oxidation of Fe-bearing powder metallurgy Ti alloys

L. Bolzoni; J. Hu; F. Yang; M. Zhang; J. Li; Z. Lu

doi:10.1016/j.jallcom.2022.164332

Kinetics of oxidation of Fe-bearing powder metallurgy Ti alloys

L. Bolzoni, J. Hu, F. Yang, M. Zhang, J. Li, Z. Lu

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

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Abstract

The aim of this work is to study the kinetics of oxidation of new Fe-bearing titanium alloys produced by the innovative powder metallurgy route of induction sintering. The characterisation of the phases formed, surface topography, mass gain, microhardness and oxide layer thickness of the Fe-bearing titanium alloys oxidised at 700 °C in air reveals that a non-uniform oxidation layer composed of either TiO₂ particles or vertically-grown TiO₂ micro-pillars at short and long oxidation times, respectively, is formed. This results in a continuous increase of the total mass gain and microhardness with the oxidation time. It is found that the oxidation mechanism is controlled by the inwards diffusion of oxygen and the outwards diffusion of Ti and the presence of the alloying elements does not significantly affect the oxidation response. The study is complemented with the identification of a relationship useful to predict the degree of oxidation.

Original language	English
Article number	164332
Journal	Journal of Alloys and Compounds
Volume	906
DOIs	https://doi.org/10.1016/j.jallcom.2022.164332
State	Published - 15 Jun 2022
Externally published	Yes

Keywords

Blended elemental
Kinetics parameters
Oxidation
Powder metallurgy
Press and sinter
Titanium alloys

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10.1016/j.jallcom.2022.164332

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title = "Kinetics of oxidation of Fe-bearing powder metallurgy Ti alloys",

abstract = "The aim of this work is to study the kinetics of oxidation of new Fe-bearing titanium alloys produced by the innovative powder metallurgy route of induction sintering. The characterisation of the phases formed, surface topography, mass gain, microhardness and oxide layer thickness of the Fe-bearing titanium alloys oxidised at 700 °C in air reveals that a non-uniform oxidation layer composed of either TiO2 particles or vertically-grown TiO2 micro-pillars at short and long oxidation times, respectively, is formed. This results in a continuous increase of the total mass gain and microhardness with the oxidation time. It is found that the oxidation mechanism is controlled by the inwards diffusion of oxygen and the outwards diffusion of Ti and the presence of the alloying elements does not significantly affect the oxidation response. The study is complemented with the identification of a relationship useful to predict the degree of oxidation.",

keywords = "Blended elemental, Kinetics parameters, Oxidation, Powder metallurgy, Press and sinter, Titanium alloys",

author = "L. Bolzoni and J. Hu and F. Yang and M. Zhang and J. Li and Z. Lu",

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doi = "10.1016/j.jallcom.2022.164332",

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TY - JOUR

T1 - Kinetics of oxidation of Fe-bearing powder metallurgy Ti alloys

AU - Bolzoni, L.

AU - Hu, J.

AU - Yang, F.

AU - Zhang, M.

AU - Li, J.

AU - Lu, Z.

PY - 2022/6/15

Y1 - 2022/6/15

N2 - The aim of this work is to study the kinetics of oxidation of new Fe-bearing titanium alloys produced by the innovative powder metallurgy route of induction sintering. The characterisation of the phases formed, surface topography, mass gain, microhardness and oxide layer thickness of the Fe-bearing titanium alloys oxidised at 700 °C in air reveals that a non-uniform oxidation layer composed of either TiO2 particles or vertically-grown TiO2 micro-pillars at short and long oxidation times, respectively, is formed. This results in a continuous increase of the total mass gain and microhardness with the oxidation time. It is found that the oxidation mechanism is controlled by the inwards diffusion of oxygen and the outwards diffusion of Ti and the presence of the alloying elements does not significantly affect the oxidation response. The study is complemented with the identification of a relationship useful to predict the degree of oxidation.

AB - The aim of this work is to study the kinetics of oxidation of new Fe-bearing titanium alloys produced by the innovative powder metallurgy route of induction sintering. The characterisation of the phases formed, surface topography, mass gain, microhardness and oxide layer thickness of the Fe-bearing titanium alloys oxidised at 700 °C in air reveals that a non-uniform oxidation layer composed of either TiO2 particles or vertically-grown TiO2 micro-pillars at short and long oxidation times, respectively, is formed. This results in a continuous increase of the total mass gain and microhardness with the oxidation time. It is found that the oxidation mechanism is controlled by the inwards diffusion of oxygen and the outwards diffusion of Ti and the presence of the alloying elements does not significantly affect the oxidation response. The study is complemented with the identification of a relationship useful to predict the degree of oxidation.

KW - Blended elemental

KW - Kinetics parameters

KW - Oxidation

KW - Powder metallurgy

KW - Press and sinter

KW - Titanium alloys

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DO - 10.1016/j.jallcom.2022.164332

M3 - 文章

AN - SCOPUS:85125587206

SN - 0925-8388

VL - 906

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 164332

ER -

Kinetics of oxidation of Fe-bearing powder metallurgy Ti alloys

Abstract

Keywords

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