Failure mechanisms in Pt–Rh thermocouple sensors caused by gaseous phosphorous species
Source abstract
Abstract
Abstract Interactions between Pt–Rh sensor alloys and P-containing gas in an environment simulating a carbon feedstock gasification process were investigated. A series of exposure tests revealed materials failure through two distinct P diffusion mechanisms, depending on Rh concentrations; intergranular diffusion in low Rh alloys and intragranular diffusion in high Rh alloys. Upon exposure, P rapidly migrated into the alloys, lowering the melting temperature of the alloys and/or forming intermediate phases with Rh at grain boundaries or within grains. The failure mechanisms of Pt–Rh alloys by P-bearing gas in the conditions studied are proposed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metallurgical Processes and Thermodynamics · Advanced Materials Characterization Techniques · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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