Protective Coatings for High Temperature, Light Weight, Structural Applications

1989 ◽  
Vol 175 ◽  
Author(s):  
J. Covino ◽  
K. Klemm ◽  
J. Dykema
Keyword(s):  
High Temperature ◽  
Silicate Glass ◽  
Protective Coatings ◽  
Glass Ceramics ◽  
Al Alloys ◽  
Aluminum Silicate ◽  
Light Weight ◽  
Structural Applications ◽  
Titanium Aluminum ◽  
Severe Environments

AbstractProtective coatings for both titanium-aluminum (Ti-Al) alloys and for carbon-carbon (C-C) composites have been synthesized and characterized for high temperature, light weight, structural applications. Coatings of choice must show protection against oxygen and hydrogen in severe environments. Aluminum-silicate glass ceramics were chosen as coating candidates because they are stable to temperatures of 1500°C, are nonreactive to oxygen, and have minimal reactivity with respect to hot hydrogen.

Crystal structure and wave-transparent properties of lithium aluminum silicate glass-ceramics

2018 ◽  
Vol 44 (12) ◽  
pp. 14896-14900 ◽  
Author(s):  
Long Xia ◽  
Yanan Yang ◽  
Xinyu Zhang ◽  
Jian Zhang ◽  
Bo Zhong ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Silicate Glass ◽  
Glass Ceramics ◽  
Aluminum Silicate ◽  
Lithium Aluminum

Corrosion Behaviour of Ti-48Al-2Nb-2Cr Alloys

2012 ◽  
Vol 323-325 ◽  
pp. 301-307
Author(s):  
B. Pelic ◽  
D. Rafaja ◽  
Patrick J. Masset ◽  
H.J. Seifert ◽  
L. Bortolotto ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Protective Coatings ◽  
Corrosion Behaviour ◽  
Base Material ◽  
High Temperature Corrosion ◽  
Al Alloy ◽  
Environmental Embrittlement ◽  
Structural Applications

γ-TiAl intermetallics are attractive materials for high-temperature structural applications in the aerospace and automobile industries. However, they show environmental embrittlement at elevated temperatures that is mainly related to their low high-temperature corrosion resistance. One way how to improve the high-temperature corrosion resistance is the deposition of protective coatings on the surface of the base material. In this study, samples of a Ti-Al alloy with the chemical composition Ti-48Al-2Cr-2Nb (at.%) were covered by physically vapour deposited (PVD), by metalorganic chemically vapour deposited (MOCVD) and by high-velocity oxy-fuel (HVOF) sprayed coatings. All coatings were based on the Ti-Al alloys and contained different amounts of alloying elements. The corrosion experiments were performed in molten salts containing 75 wt.% Na2SO4and 25 wt.% NaCl at 850°C up to 336 h. Both, PVD and CVD protected coatings reduced the changes in the mass of the samples over the corrosion time. Still, the formation of TiO2could not be avoided, as it was confirmed by glancing-angle X-ray diffraction experiments.

Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb 2 O 5

2019 ◽  
Vol 11 (1) ◽  
pp. 155-169 ◽  
Author(s):  
Tobias Benitez ◽  
Alexander Veber ◽  
Kaline Pagnan Furlan ◽  
Lara Barros Rebouças ◽  
Dominique Ligny ◽  
...  
Keyword(s):  
Silicate Glass ◽  
Glass Ceramics ◽  
Aluminum Silicate ◽  
Magnesium Aluminum Silicate

Preparation, structural and thermo-mechanical properties of lithium aluminum silicate glass–ceramics

2009 ◽  
Vol 35 (4) ◽  
pp. 1661-1666 ◽  
Author(s):  
A. Arvind ◽  
Rakesh Kumar ◽  
M.N. Deo ◽  
V.K. Shrikhande ◽  
G.P. Kothiyal
Keyword(s):  
Mechanical Properties ◽  
Silicate Glass ◽  
Glass Ceramics ◽  
Aluminum Silicate ◽  
Lithium Aluminum
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