TY - JOUR
T1 - Preparation and oxidation resistance of silicide/aluminide composite coatings on an Nb-Ti-Si based alloy
AU - Zhang, Ping
AU - Guo, Xiping
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/7/25
Y1 - 2015/7/25
N2 - Silicide/aluminide composite coatings were prepared on an Nb-Ti-Si based alloy by a two-step pack cementation process including siliconizing firstly and then aluminizing. The siliconized coating is composed of a thick (Nb,X)Si2 outer layer and a thin (Ti,Nb)5Si4 inner layer. During the aluminizing process, the original (Nb,X)Si2 outer layer retains and Al moves through it to form an Al3(Nb,X) layer beneath it. Besides, a thin Al3(Nb,X) outermost layer also forms above the (Nb,X)Si2 layer. This composite coating possesses good oxidation resistance at 1250°C within 50h, and a double-layered scale with an Al2O3 outer layer and a SiO2-matrix inner layer forms.
AB - Silicide/aluminide composite coatings were prepared on an Nb-Ti-Si based alloy by a two-step pack cementation process including siliconizing firstly and then aluminizing. The siliconized coating is composed of a thick (Nb,X)Si2 outer layer and a thin (Ti,Nb)5Si4 inner layer. During the aluminizing process, the original (Nb,X)Si2 outer layer retains and Al moves through it to form an Al3(Nb,X) layer beneath it. Besides, a thin Al3(Nb,X) outermost layer also forms above the (Nb,X)Si2 layer. This composite coating possesses good oxidation resistance at 1250°C within 50h, and a double-layered scale with an Al2O3 outer layer and a SiO2-matrix inner layer forms.
KW - Microstructure
KW - Nb-Ti-Si based alloy
KW - Oxidation resistance
KW - Silicide/aluminide composite coating
KW - Two-step pack cementation
UR - http://www.scopus.com/inward/record.url?scp=84929656132&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2015.04.016
DO - 10.1016/j.surfcoat.2015.04.016
M3 - 文章
AN - SCOPUS:84929656132
SN - 0257-8972
VL - 274
SP - 18
EP - 25
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -