TEM study of the initial oxidation of Ti42Al48Cr8Ag2
Guo, Changyou; Zhang, Caibei; Lu, Wei; He, Lianlong; Xi, Yanjun; Wang, Fuhui
Corresponding AuthorZhang, Caibei(
AbstractA microstructural investigation of oxide scales was carried out by analytical electron microscope (AEM) after the as-cast Ti42Al48Cr8Ag2 alloy was exposed to air at 1,173 K for 5, 30 and 180 min, respectively. The results indicated that the formation of oxide scale experiences a transformation from ternary-layer system consisting of an outmost rutile (TiO2-rich) layer, mid amorphous alumina and inner nitrides to a double-layer of TiO2 and Al2O3-rich with increasing time from 5 to 30 min. In the subsurface zone, a change was also found a metastable Cr-rich new phase with bcc structure of a = 1.371 nm formed in addition to the oxidation for X-phase during 30 min. After 180 min, a continuous Laves-phase layer formed instead at the same position. In addition, the process revealed that amorphous alumina changed to a metastable structure before stable alpha-Al2O3 formed.
KeywordTi42Al48Cr8Ag2 alloy AEM oxidation nitrides new phase
Indexed BySCI
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000247931600006
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorZhang, Caibei
Affiliation1.Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China
2.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
3.Zhongyuan Univ Technol, Zhengzhou 450007, Peoples R China
Recommended Citation
GB/T 7714
Guo, Changyou,Zhang, Caibei,Lu, Wei,et al. TEM study of the initial oxidation of Ti42Al48Cr8Ag2[J]. OXIDATION OF METALS,2007,68(1-2):65-76.
APA Guo, Changyou,Zhang, Caibei,Lu, Wei,He, Lianlong,Xi, Yanjun,&Wang, Fuhui.(2007).TEM study of the initial oxidation of Ti42Al48Cr8Ag2.OXIDATION OF METALS,68(1-2),65-76.
MLA Guo, Changyou,et al."TEM study of the initial oxidation of Ti42Al48Cr8Ag2".OXIDATION OF METALS 68.1-2(2007):65-76.
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