J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (7): 1479-1484.DOI: 10.1016/j.jmst.2019.02.005
• Orginal Article • Previous Articles Next Articles
Zhangping Hua, Yifei Xua, Yuanyuan Chena, Peter Schützendübebb, Jiangyong Wangc*, Yuan Huanga, Yongchang Liua, Zumin Wanga()
Received:
2018-09-26
Revised:
2019-01-24
Accepted:
2019-02-01
Online:
2019-07-20
Published:
2019-06-20
Contact:
Wang Jiangyong
About author:
1These authors contributed equally to this work.
Zhangping Hu, Yifei Xu, Yuanyuan Chen, Peter Schützendübeb, Jiangyong Wang, Yuan Huang, Yongchang Liu, Zumin Wang. Anomalous formation of micrometer-thick amorphous oxide surficial layers during high-temperature oxidation of ZrAl2[J]. J. Mater. Sci. Technol., 2019, 35(7): 1479-1484.
Fig. 1. (a) XRD patterns of the as-cast and the oxidized ZrAl2 alloys at oxidation temperatures of 550 °C, 650 °C and 750 °C (in pure oxygen for 24 h); (b) magnified XRD pattern for the ZrAl2 oxidized at 750 °C; (c-e) surface SEM micrographs of the ZrAl2 alloy oxidized at 550 °C (c), 650 °C (d) and 750 °C (e) for 24 h, respectively.
Fig. 2. Cross-sectional SEM micrographs of ZrAl2 oxidized at (a) 550 °C, (b) 650 °C, (c) 750 °C for 24 h in pure oxygen (pO2 = 1 × 105 Pa). (d) AES elemental concentration-depth profiles of ZrAl2 oxidized at 550 °C for 24 h. (e, f) Cross-sectional EDS-line profiles of ZrAl2 oxidized at 650 °C (e) and 750 °C (f) for 24 h.
Fig. 3. (a) Cross-sectional TEM image of ZrAl2 oxidized at 750 °C for 24 h; (b) Cross-sectional HRTEM image of the region marked in (a). Arrow marks the location of the oxide/substrate interface; (c) SAD pattern of the substrate region and (d) SAD pattern of the oxide region.
Fig. 4. (a) Measured mass gain of ZrAl2 per unit surface area as a function of the oxidation time at 550 °C, 650 °C and 750 °C. (b) The square of mass gain per unit surface area as a function of oxidation time at 550 °C, 650 °C and 750 °C. (c) Arrhenius plot of parabolic rate constants kp for oxidation of ZrAl2 at 550 °C, 650 °C and 750 °C.
Fig. 5. Schematic illustration of (i) the continuous growth of existing amorphous oxide and (ii) the new nucleation of a crystalline oxide layer at the oxide/alloy-substrate interface.
Specimen | Mode | A | Q (kJ/mol) | Studied temperature range |
---|---|---|---|---|
ZrAl2 [this work] | parabolic | 5.222 × 10-2 | 143 | 550-750 °C |
am-Zr0.32Al0.68 [ | parabolic | 1.4 × 10-15 | 73 | 350-400 °C |
Al [ | parabolic | 6.3 × 10-5 | 138.55 | 400-600 °C |
Zr [ | parabolic | —— | 119.72 | 525-750 °C |
Table 1 Oxidation kinetics parameters of crystalline ZrAl2, amorphous Zr0.32Al0.68 (am-Zr0.32Al0.68), crystalline Al and crystalline Zr: the pre-exponential factor A, the activation energy Q.
Specimen | Mode | A | Q (kJ/mol) | Studied temperature range |
---|---|---|---|---|
ZrAl2 [this work] | parabolic | 5.222 × 10-2 | 143 | 550-750 °C |
am-Zr0.32Al0.68 [ | parabolic | 1.4 × 10-15 | 73 | 350-400 °C |
Al [ | parabolic | 6.3 × 10-5 | 138.55 | 400-600 °C |
Zr [ | parabolic | —— | 119.72 | 525-750 °C |
|
[1] | Yuecun Wang, Meng Li, Yueqing Yang, Xin’ai Zhao, Evan Ma, Zhiwei Shan. In-situ surface transformation of magnesium to protect against oxidation at elevated temperatures [J]. J. Mater. Sci. Technol., 2020, 44(0): 48-53. |
[2] | Zhiqiang Xu, Yifei Xu, An Zhang, Jiangyong Wang, Zumin Wang. Oxidation of amorphous alloys [J]. J. Mater. Sci. Technol., 2018, 34(11): 1977-2005. |
[3] | Yuzhi Li, Florian Pyczak, Jonathan Paul, Zekun Yao. Oxidation behaviors of Co-Al-W-0.1B superalloys in a long-term isothermal exposure at 900 °C [J]. J. Mater. Sci. Technol., 2018, 34(11): 2212-2217. |
[4] | Bhagaban Behera, Sudhir Chandra. Synthesis and Characterization of ZnO Nanowires and ZnO-CuO Nanoflakes from Sputter-Deposited Brass (Cu0.65-Zn0.35) Film and Their Application in Gas Sensing [J]. J. Mater. Sci. Technol., 2015, 31(11): 1069-1078. |
[5] | Lu Wang, Dongqing Li, Jian Chang, Hongbo Guo, Shengkai Gong, Huibin Xu. Isothermal Oxidation Behavior of Dysprosium/S-Doped b-NiAl Alloys at 1200 °C [J]. J. Mater. Sci. Technol., 2014, 30(3): 229-233. |
[6] | Amandeep Kaur Bal, Rajinder Singh, R.K. Bedi. Effect of Ni7+ Ion Irradiation on Structure and Ammonia Sensing Properties of Thermally Oxidized Zinc and Indium Films [J]. J Mater Sci Technol, 2012, 28(8): 700-706. |
[7] | Y.C. Ma, X.J. Zhao, M. Gao, K. Liu. High-Temperature Oxidation Behavior of a Ni-Cr-W-Al Alloy [J]. J Mater Sci Technol, 2011, 27(9): 841-845. |
[8] | B. Saeedi,A. Sabour,A. Ebadi,A.M. Khoddami. Influence of the Thermal Barrier Coatings Design on the Oxidation Behavior [J]. J Mater Sci Technol, 2009, 25(04): 499-507. |
[9] | Xiufang Chen,Lina Ning,Yingmin Wang,Juan Li,Xiangang Xu,Xiaobo Hu,Minhua Jiang. Thermal Oxidation of Silicon Carbide Substrates [J]. J Mater Sci Technol, 2009, 25(01): 115-118. |
[10] | Dongbai XIE, Fuhui WANG. Oxidation and Hot Corrosion Behavior of a Composite Coating System [J]. J Mater Sci Technol, 2003, 19(06): 567-570. |
[11] | Mengjin LI, Xiaofeng SUN, Hengrong GUAN, Xiaoxia JIANG, Zhuangqi HU. Oxidation Behevior of Pd-Modified Aluminide Coating at High Temperature [J]. J Mater Sci Technol, 2003, 19(03): 213-217. |
[12] | GUO Chaoqi YANG Bingguang MA Jiming ** Institute of Aeronautical Materials,Beijing,100095,China+ To whom correspondence should be addressed. Kinetics of Oxidation Resistance of the Ti_3Al-base Intermetallic Alloys [J]. J Mater Sci Technol, 1992, 8(2): 138-140. |
Viewed | ||||||
Full text |
|
|||||
Abstract |
|
|||||