Microstructure and oxidation behavior of Nb-based multi-phase alloys

Wenqing Wei; Hongwei Wang; Chunming Zou; Zhaojun Zhu; Zunjie Wei

doi:10.1016/j.matdes.2012.09.046

Microstructure and oxidation behavior of Nb-based multi-phase alloys

Wenqing Wei^*
, Hongwei Wang
, Chunming Zou
, Zhaojun Zhu
, Zunjie Wei

^*Corresponding author for this work

Weifang University
Harbin Institute of Technology

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

45 Scopus citations

Abstract

The microstructures and oxidation behaviors of the Nb-(21,35)Ti-4C and Nb-(9,25)Ti-8C alloy have been investigated. The alloys consist of Niobium solid solution (Nbss) and carbide of (Nb, Ti)C, and additional carbide of Nb₂C is detected in Nb-9Ti-8C alloy. In the range of 800 and 1000°C, the oxide layers are a mixture of Nb₂O₅, NbO₂ and TiO₂ for each alloy, and Nb-25Ti-8C alloy exhibits excellent oxidation resistance. The oxidation resistance improves with increasing the Ti due to the element diffuses toward the reaction interface and reacts with oxygen primarily and this causes the decreasing of solubility and diffusion rate of oxygen into the Nbss matrix. But the oxidation behavior aggravates with increasing the oxidation temperature. The oxide mechanism of carbide is the reaction formed C dissolving into metal oxide and desorption of CO and CO₂.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Materials and Design
Volume	46
DOIs	https://doi.org/10.1016/j.matdes.2012.09.046
State	Published - Apr 2013
Externally published	Yes

Keywords

Microstructure
Multi-materials
Oxidation

Access to Document

10.1016/j.matdes.2012.09.046

Cite this

@article{41d12abf20d447719b7e5a983ff201df,

title = "Microstructure and oxidation behavior of Nb-based multi-phase alloys",

abstract = "The microstructures and oxidation behaviors of the Nb-(21,35)Ti-4C and Nb-(9,25)Ti-8C alloy have been investigated. The alloys consist of Niobium solid solution (Nbss) and carbide of (Nb, Ti)C, and additional carbide of Nb2C is detected in Nb-9Ti-8C alloy. In the range of 800 and 1000°C, the oxide layers are a mixture of Nb2O5, NbO2 and TiO2 for each alloy, and Nb-25Ti-8C alloy exhibits excellent oxidation resistance. The oxidation resistance improves with increasing the Ti due to the element diffuses toward the reaction interface and reacts with oxygen primarily and this causes the decreasing of solubility and diffusion rate of oxygen into the Nbss matrix. But the oxidation behavior aggravates with increasing the oxidation temperature. The oxide mechanism of carbide is the reaction formed C dissolving into metal oxide and desorption of CO and CO2.",

keywords = "Microstructure, Multi-materials, Oxidation",

author = "Wenqing Wei and Hongwei Wang and Chunming Zou and Zhaojun Zhu and Zunjie Wei",

year = "2013",

month = apr,

doi = "10.1016/j.matdes.2012.09.046",

language = "英语",

volume = "46",

pages = "1--7",

journal = "Materials and Design",

issn = "0264-1275",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Microstructure and oxidation behavior of Nb-based multi-phase alloys

AU - Wei, Wenqing

AU - Wang, Hongwei

AU - Zou, Chunming

AU - Zhu, Zhaojun

AU - Wei, Zunjie

PY - 2013/4

Y1 - 2013/4

N2 - The microstructures and oxidation behaviors of the Nb-(21,35)Ti-4C and Nb-(9,25)Ti-8C alloy have been investigated. The alloys consist of Niobium solid solution (Nbss) and carbide of (Nb, Ti)C, and additional carbide of Nb2C is detected in Nb-9Ti-8C alloy. In the range of 800 and 1000°C, the oxide layers are a mixture of Nb2O5, NbO2 and TiO2 for each alloy, and Nb-25Ti-8C alloy exhibits excellent oxidation resistance. The oxidation resistance improves with increasing the Ti due to the element diffuses toward the reaction interface and reacts with oxygen primarily and this causes the decreasing of solubility and diffusion rate of oxygen into the Nbss matrix. But the oxidation behavior aggravates with increasing the oxidation temperature. The oxide mechanism of carbide is the reaction formed C dissolving into metal oxide and desorption of CO and CO2.

AB - The microstructures and oxidation behaviors of the Nb-(21,35)Ti-4C and Nb-(9,25)Ti-8C alloy have been investigated. The alloys consist of Niobium solid solution (Nbss) and carbide of (Nb, Ti)C, and additional carbide of Nb2C is detected in Nb-9Ti-8C alloy. In the range of 800 and 1000°C, the oxide layers are a mixture of Nb2O5, NbO2 and TiO2 for each alloy, and Nb-25Ti-8C alloy exhibits excellent oxidation resistance. The oxidation resistance improves with increasing the Ti due to the element diffuses toward the reaction interface and reacts with oxygen primarily and this causes the decreasing of solubility and diffusion rate of oxygen into the Nbss matrix. But the oxidation behavior aggravates with increasing the oxidation temperature. The oxide mechanism of carbide is the reaction formed C dissolving into metal oxide and desorption of CO and CO2.

KW - Microstructure

KW - Multi-materials

KW - Oxidation

UR - https://www.scopus.com/pages/publications/84868154438

U2 - 10.1016/j.matdes.2012.09.046

DO - 10.1016/j.matdes.2012.09.046

M3 - 文章

AN - SCOPUS:84868154438

SN - 0264-1275

VL - 46

SP - 1

EP - 7

JO - Materials and Design

JF - Materials and Design

ER -

Microstructure and oxidation behavior of Nb-based multi-phase alloys

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this