Thermal Barriers and Heat Sinks

Porous aluminum titanate DMO has both a low thermal expansion coefficient (nearly zero at least up to 600°C) and a low thermal conductivity, suggesting possible applications in thermal barriers and abradable seals for turbine rotor shrouds [116] and automobile exhaust port liners and gas desulfurization nozzles [117]. Other possible thermal applications of silicon carbide reinforced DMO include heat exchangers [117] and flaps and seals in the afterburners of jet engines [119]. In addition, SiC particulate-reinforced DMO could serve as a lossy insert for high powered microwave tubes, withstanding temperatures up to 1000°C in ultrahigh vacuum. 

It has even been suggested that very large DMO composite cylinders might be suitable for applications in deep-sea submersibles [120]. 

Mehrabian, in Processing and Manufacturing of Advanced Materials for High Temperature Applications, V. A. Ravi and T. S. Srivatsan (Eds), The Minerals, Metals and Materials Society, Warrendalc, USA, 1992, pp. 157-171. 

A Fundamental Study of the Formation of AI2O3/AI Composites from the Oxidation of Liquid A1 Alloys, PhD thesis. University of California at Santa Barbara, USA, 1992. 

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