Damnification Mechanism of SiC Heating Elements Used in N2 Atmosphere
[1]LIU Xinhong,NIU Zhiwang,ZHOU Chaojie,et al.Damnification Mechanism of SiC Heating Elements Used in N2 Atmosphere[J].Journal of Zhengzhou University (Engineering Science),2014,35(03):24-29.[doi:10.3969/j.issn.1671-6833.2014.03.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
35卷
Number of periods:
2014 03
Page number:
24-29
Column:
Public date:
2014-06-30
- Title:
- Damnification Mechanism of SiC Heating Elements Used in N2 Atmosphere
- Keywords:
- SiC heating elements; N; atmosphere ; damnifieation mechanism
- CLC:
- TQ175.1
- DOI:
- 10.3969/j.issn.1671-6833.2014.03.005
- Abstract:
- Phase eomposition and mierostruelure of SiC heating elements used in N, almosphere have been an-alyzed by XRD and SEM, and the damnifieation mechanism of Sic heating elements is diseussed. The resultsshow ; there are many pores in unchanged part which provide channels for the corrosive gas leading to damnif.eation , and the impurities Si, K,0 and FeSi would aeeelerate damnifieation during use ; a protective film inthe surfaee of SiC cannot form in N, almosphere due to low pressure of 0,,and the trace 0, in N, atmospherereacts with SiC leading to structure loosing which inereases oxidizing damage; Al(g), Al,0(g) and CO(g)from refraetories eontaining Al, Si and C reaet with SiC to form B-SiC and Al,0,, which leads to damage.
- References:
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