Surface Acoustic Wave H2 and O2 Sensors Based on Conducting Metal Oxides/Langasite for Elevated Temperature Applications

2020 ◽  
Author(s):  
Jagannath Devkota ◽  
Elizabeth Mao ◽  
John Baltrus ◽  
Paul R. Ohodnicki ◽  
Benjamin Chorpening
Keyword(s):  
Elevated Temperature ◽  
Acoustic Wave ◽  
Metal Oxides ◽  
Surface Acoustic Wave ◽  
Conducting Metal Oxides ◽  
Temperature Applications

Surface acoustic wave devices based on AlN/sapphire structure for high temperature applications

2010 ◽  
Vol 96 (20) ◽  
pp. 203503 ◽  
Author(s):  
Thierry Aubert ◽  
Omar Elmazria ◽  
Badreddine Assouar ◽  
Laurent Bouvot ◽  
Mourad Oudich
Keyword(s):  
High Temperature ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Acoustic Wave Devices ◽  
Temperature Applications

Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

1988 ◽  
Vol 46 ◽  
pp. 550-551
Author(s):  
R. E. Franck ◽  
J. A. Hawk ◽  
G. J. Shiflet
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Grain Growth ◽  
Volume Fraction ◽  
Microstructural Characterization ◽  
Second Phase ◽  
Microstructural Stability ◽  
Elevated Temperature Strength ◽  
Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

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