以抗<strong>CMAS</strong>腐蚀为目标的稀土硅酸盐环境障涂层高熵化设计与性能提升

以抗CMAS腐蚀为目标的稀土硅酸盐环境障涂层高熵化设计与性能提升

王京阳, 孙鲁超, 罗颐秀, 田志林, 任孝旻, 张洁

Rare Earth Silicate Environmental Barrier Coating Material: High-Entropy Design and Resistance to CMAS Corrosion

WANG Jingyang, SUN Luchao, LUO Yixiu, TIAN Zhilin, REN Xiaomin, ZHANG Jie

表1 (4RE_1/4)₂SiO₅在1500℃下CMAS腐蚀4 h后反应析出层和冷却析出层的磷灰石相中稀土元素RE与Ca的EDS定量分析结果^[41] (atomic fraction / %)

Table 1 EDS analysis apatite phases in reaction precipitation layer and cooling precipitation layer for (4RE_1/4)₂SiO₅ after CMAS corrosion at 1500^oC for 4 h^[41]

Element	(Y_1/4Ho_1/4Er_1/4Yb_1/4)₂SiO₅		(Ho_1/4Er_1/4Yb_1/4Lu_1/4)₂SiO₅
Element	Reaction precipitation layer	Cooling precipitation layer	Reaction precipitation layer	Cooling precipitation layer
Y	4.32 ± 0.31	6.19 ± 0.45	-	-
Ho	3.80 ± 0.29	5.85 ± 0.47	3.90 ± 0.31	6.48 ± 0.54
Er	3.65 ± 0.29	5.73 ± 0.49	3.66 ± 0.34	6.14 ± 0.55
Yb	3.00 ± 0.25	4.77 ± 0.42	3.07 ± 0.27	5.17 ± 0.47
Lu	-	-	2.74 ± 0.31	4.62 ± 0.54
Ca	3.97 ± 0.27	7.19 ± 0.48	3.95 ± 0.28	7.53 ± 0.53
RE∶Ca	3.72	3.13	3.34	2.98