A Taylor presumes that the first high-temperature camera was produced by Wilson & Jay in 1941. My first high-temperature camera was made by Materials Research Corporation and was (with vacuum-system PT450 fy. Laybold-Heraeus) very robust. My present instrument with the temperature camera PAAR from Austria hangs on a goniometer inside the radiation protective cover. But the fundamental advance means standard facilities by the Position Sensitive detector. It makes possible to watch also fast phase transfornations, or other structural changes, 'in situ'. Perhaps the most attractive investigations was made on the casting powders in liquid state (exactly in two phase region between liquidus and solidus).
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