High temperature oxidation of plasma and HVOF thermal sprayed CoNiCrAlY coatings in simulated gas turbine and furnace environments

被引：15
作者：
Higuero, V. [2 ]
Belzunce, F. J. [1 ]
Riba, J. [1 ]
机构：
[1] Univ Oviedo, Dept Mat Sci, Gijon 33203, Spain
[2] Univ Oviedo, Dept Mech Engn, Gijon 33203, Spain
来源：
SURFACE ENGINEERING | 2009年 / 25卷 / 04期
关键词：
CoNiCrAlY coatings; High temperature oxidation; Thermal spraying; BARRIER COATINGS; EROSION WEAR; BEHAVIOR;
D O I：
10.1179/026708408X375271
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
CoNiCrAlY powders were thermal sprayed using plasma (atmospheric plasma spraying) and high velocity oxyfuel procedures onto AISI 310 austenitic stainless steel specimens in order to study the cyclic oxidation behaviour of these coatings in air and in a simulated gas turbine environment (10% oxygen) at 800 and 1000 degrees C. The oxidation behaviour and hardness evolution of both coatings were significantly different, and the observed weight gain for the plasma spray coating was always much greater due to the presence of substantial open interconnected porosity. In both cases, protective alumina (Al2O3) and spinel CoAl2O4 layers were created.
引用
收藏
页码：319 / 325
页数：7
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