Phase formation and microstructure evolution of arc ion deposited Cr2AlC coating after heat treatment
Phase formation and microstructure evolution of arc ion deposited Cr2AlC coating after heat treatment
复制标题
电弧离子沉积Cr2AlC涂层热处理后的物相形成及显微组织演变
DOI：
10.1016/j.apsusc.2012.09.082
复制
发表时间：
2012-12
影响因子：
6.7
通讯作者：
Li, M. S.
中科院分区：
文献类型：
--
作者：
Niu, D.;Zhang, M. M.;Liu, Z. M.;Li, M. S.
Cr2AlC具有优异的抗氧化和热腐蚀性能以及与普通合金相匹配的热膨胀系数，作为高温防护涂层具有潜在的应用前景。本工作采用阴极电弧沉积法结合热后处理的方法实现了Cr2AlC涂层的制备。结果发现，Cr2AlC 化合物靶材在无意加热条件下沉积的涂层是非晶态的。在620℃氩气中退火20h后，非晶态Cr-Al-C涂层发生结晶并转变成以晶态Cr2AlC为主相。很明显，Cr2AlC 的形成温度从烧结体的约 1050°C 降低到沉积态涂层的约 620°C，这是由于 Cr-Al-C 涂层中 Cr、Al 和 C 在原子水平上的均匀混合。退火后的涂层除含有结晶Cr2AlC外，还含有AlCr2和少量Cr7C3。 AlCr2是由于沉积过程中C的损失而形成的，而烧结的Cr2AlC复合靶材中始终存在少量Cr7C3作为杂质相。
Due to the excellent oxidation and hot corrosion resistance and matched thermal expansion coefficient to normal alloys, Cr2AlC has potential applications as high-temperature protective coating. In the present work, the preparation of Cr2AlC coating has been achieved through cathodic arc deposition method combined with heat post-treatment. It was found that the coating, deposited from Cr2AlC compound target in the unintentional heating condition, was amorphous. After annealing at 620°C in Ar for 20h, the amorphous Cr–Al–C coating happened to crystallize and transformed to crystalline Cr2AlC as the major phase. It is obvious that the formation temperature of Cr2AlC was decreased from about 1050°C for sintered bulk to around 620°C for the as-deposited coating, resulting from the homogeneous mixture of the Cr, Al and C at atomic level in the Cr–Al–C coating. Apart from crystalline Cr2AlC, the annealed coating also contained AlCr2and little Cr7C3. AlCr2formed due to the loss of C during deposition, and little Cr7C3always existed in the sintered Cr2AlC compound target as impurity phase.
登录
查看更多内容
DOI：
10.1116/1.3584803
发表时间：
2011-06
期刊：
Journal of Vacuum Science and Technology
影响因子：
--
作者：
V. Edlmayr;T. Harzer;R. Hoffmann;D. Kiener;C. Scheu;C. Mitterer
通讯作者：
V. Edlmayr;T. Harzer;R. Hoffmann;D. Kiener;C. Scheu;C. Mitterer
影响因子：
5.4
作者：
M. Pohler;R. Franz;J. Ramm;P. Polcik;C. Mitterer
通讯作者：
M. Pohler;R. Franz;J. Ramm;P. Polcik;C. Mitterer
Mg2SiO4微波介质的高能球磨和低温烧结制备纳米粉末
影响因子：
6.2
作者：
Lin Cheng;Peng Liu;XiaoMing Chen;HuaiWu Zhang
通讯作者：
HuaiWu Zhang
影响因子：
2.7
作者：
A. Eriksson;Jianqiang Zhu;N. Ghafoor;J. Jensen;G. Greczynski;M. Johansson;J. Sjoelen;M. Odén;L. Hultman;J. Rosen
通讯作者：
A. Eriksson;Jianqiang Zhu;N. Ghafoor;J. Jensen;G. Greczynski;M. Johansson;J. Sjoelen;M. Odén;L. Hultman;J. Rosen
影响因子：
6
作者：
W. Tian;Pei-ling Wang;Guo‐Jun Zhang;Y. Kan;Yongxiang Li;D. Yan
通讯作者：
W. Tian;Pei-ling Wang;Guo‐Jun Zhang;Y. Kan;Yongxiang Li;D. Yan