Oxidation behavior of (Mo₁₋xWx)Si₂ high-temperature heating elements (초고온용 발열체 (Mo₁₋xWx)Si₂의 산화거동에 대한 연구)

Sung-Chul Lee (이성철); Jaeha Myung (명재하); Yongnam Kim (김용남); Minseok Jeon (전민석); Dong-Won Lee (이동원); Oh Jong Min (오종민); Bae-Yeon Kim (김배연)

doi:10.6111/JKCGCT.2020.30.5.200

Oxidation behavior of (Mo₁₋xWx)Si₂ high-temperature heating elements

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2020, 30(5), pp.200-207
DOI : 10.6111/JKCGCT.2020.30.5.200
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering
Received : August 25, 2020
Accepted : October 20, 2020
Published : October 31, 2020

Sung-Chul Lee ¹, Jaeha Myung ¹, Yongnam Kim ², Minseok Jeon ², Dong-Won Lee ², Oh Jong Min ³, Bae-Yeon Kim ¹

¹인천대학교
²한국산업기술시험원
³광운대학교

Accredited

ABSTRACT

MoSi2, (Mo1/2W1/2)Si2, and WSi2 powders were synthesized by self-propagating high-temperature synthesis (SHS)method. The synthesized powders were heat-treated at 500, 1,000, 1,200, 1,300, 1,400, 1,500 and 1,600°C in ambientatmosphere. Oxidation of Mo-W silicide powder was found at low temperature of 500°C. XRD structure analysis and DTA/TG data showed that MoO3 was formed with 500°C heat treatment for 1 hour, and that it was α-cristobalite phase that was formed with 1200°C heat treatment, not α-quartz phase which is commonly found and stable at room temperature. Existence of W accelerated decomposition at both low and high temperature. Fully sintered MoSi2 and (Mo1/2W1/2)Si2 specimen did not show decomposition or weight loss by oxidation, with 1 hour heat treatment at either low or high temperature. Notably, it was difficult to sinter WSi2 because of oxidation reaction at low temperature.

KEYWORDS

MoSi2, (Mo1/2W1/2)Si2, WSi2, SHS, Oxidation, Pest

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Oxidation behavior of (Mo₁₋xWx)Si₂ high-temperature heating elements

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Oxidation behavior of (Mo₁₋xWx)Si₂ high-temperature heating elements

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