Isothermal oxidation behavior of reactive hot-pressed TiN-TiB2 ceramics at elevated temperatures

Zhen Lin Yang; Jia Hu Ouyang; Zhan Guo Liu

doi:10.1016/j.matdes.2010.06.041

Isothermal oxidation behavior of reactive hot-pressed TiN-TiB₂ ceramics at elevated temperatures

Zhen Lin Yang
, Jia Hu Ouyang^*
, Zhan Guo Liu

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

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

17 Scopus citations

Abstract

Isothermal oxidation behavior of reactive hot-pressed TiN-TiB₂ ceramics with various TiN/TiB₂ molar ratios of 2/1, 1/1 and 1/2 was evaluated in the temperature range of 500-800°C in air. TiN-TiB₂ ceramics have a relative density of 97-98.6%. The oxidation weight gains of TiN-TiB₂ ceramics depend upon the composition, oxidation temperature and exposure time. The structure and morphology of oxidized layers of TiN-TiB₂ ceramics were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). During isothermal oxidation of TiN-TiB₂ ceramics, anatase and rutile-TiO₂ form as the oxidized products at 500°C. However, phase transformation from anatase to rutile occurs at temperatures between 500 and 600°C, and therefore rutile-TiO₂ becomes the only crystalline phase after oxidation at temperatures of 600-800°C for 10h. The oxidation mechanism was proposed with reference to thermodynamically feasible oxidation reactions. The influence of composition on oxidation behavior of TiN-TiB₂ ceramics varies with temperature.

Original language	English
Pages (from-to)	29-35
Number of pages	7
Journal	Materials and Design
Volume	32
Issue number	1
DOIs	https://doi.org/10.1016/j.matdes.2010.06.041
State	Published - Jan 2011

Keywords

A. Rutile
A. TiN-TiB
E. Oxidation

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title = "Isothermal oxidation behavior of reactive hot-pressed TiN-TiB2 ceramics at elevated temperatures",

abstract = "Isothermal oxidation behavior of reactive hot-pressed TiN-TiB2 ceramics with various TiN/TiB2 molar ratios of 2/1, 1/1 and 1/2 was evaluated in the temperature range of 500-800°C in air. TiN-TiB2 ceramics have a relative density of 97-98.6\%. The oxidation weight gains of TiN-TiB2 ceramics depend upon the composition, oxidation temperature and exposure time. The structure and morphology of oxidized layers of TiN-TiB2 ceramics were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). During isothermal oxidation of TiN-TiB2 ceramics, anatase and rutile-TiO2 form as the oxidized products at 500°C. However, phase transformation from anatase to rutile occurs at temperatures between 500 and 600°C, and therefore rutile-TiO2 becomes the only crystalline phase after oxidation at temperatures of 600-800°C for 10h. The oxidation mechanism was proposed with reference to thermodynamically feasible oxidation reactions. The influence of composition on oxidation behavior of TiN-TiB2 ceramics varies with temperature.",

keywords = "A. Rutile, A. TiN-TiB, E. Oxidation",

author = "Yang, \{Zhen Lin\} and Ouyang, \{Jia Hu\} and Liu, \{Zhan Guo\}",

year = "2011",

month = jan,

doi = "10.1016/j.matdes.2010.06.041",

language = "英语",

volume = "32",

pages = "29--35",

journal = "Materials and Design",

issn = "0264-1275",

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TY - JOUR

T1 - Isothermal oxidation behavior of reactive hot-pressed TiN-TiB2 ceramics at elevated temperatures

AU - Yang, Zhen Lin

AU - Ouyang, Jia Hu

AU - Liu, Zhan Guo

PY - 2011/1

Y1 - 2011/1

N2 - Isothermal oxidation behavior of reactive hot-pressed TiN-TiB2 ceramics with various TiN/TiB2 molar ratios of 2/1, 1/1 and 1/2 was evaluated in the temperature range of 500-800°C in air. TiN-TiB2 ceramics have a relative density of 97-98.6%. The oxidation weight gains of TiN-TiB2 ceramics depend upon the composition, oxidation temperature and exposure time. The structure and morphology of oxidized layers of TiN-TiB2 ceramics were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). During isothermal oxidation of TiN-TiB2 ceramics, anatase and rutile-TiO2 form as the oxidized products at 500°C. However, phase transformation from anatase to rutile occurs at temperatures between 500 and 600°C, and therefore rutile-TiO2 becomes the only crystalline phase after oxidation at temperatures of 600-800°C for 10h. The oxidation mechanism was proposed with reference to thermodynamically feasible oxidation reactions. The influence of composition on oxidation behavior of TiN-TiB2 ceramics varies with temperature.

AB - Isothermal oxidation behavior of reactive hot-pressed TiN-TiB2 ceramics with various TiN/TiB2 molar ratios of 2/1, 1/1 and 1/2 was evaluated in the temperature range of 500-800°C in air. TiN-TiB2 ceramics have a relative density of 97-98.6%. The oxidation weight gains of TiN-TiB2 ceramics depend upon the composition, oxidation temperature and exposure time. The structure and morphology of oxidized layers of TiN-TiB2 ceramics were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). During isothermal oxidation of TiN-TiB2 ceramics, anatase and rutile-TiO2 form as the oxidized products at 500°C. However, phase transformation from anatase to rutile occurs at temperatures between 500 and 600°C, and therefore rutile-TiO2 becomes the only crystalline phase after oxidation at temperatures of 600-800°C for 10h. The oxidation mechanism was proposed with reference to thermodynamically feasible oxidation reactions. The influence of composition on oxidation behavior of TiN-TiB2 ceramics varies with temperature.

KW - A. Rutile

KW - A. TiN-TiB

KW - E. Oxidation

UR - https://www.scopus.com/pages/publications/77956180349

U2 - 10.1016/j.matdes.2010.06.041

DO - 10.1016/j.matdes.2010.06.041

M3 - 文章

AN - SCOPUS:77956180349

SN - 0264-1275

VL - 32

SP - 29

EP - 35

JO - Materials and Design

JF - Materials and Design

IS - 1

ER -

Isothermal oxidation behavior of reactive hot-pressed TiN-TiB₂ ceramics at elevated temperatures

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Keywords

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