HIGH TEMPERATURE X-RAY METALLOGRAPHY. I. A NEW DEBYE-SCHERRER CAMERA FOR USE AT A VERY HIGH TEMPERATURES. II. A NEW PARAFOCUSING CAMERA. III. APPLICATIONS TO THE STUDY OF CHROMIUM, HAFNIUM, MOLYBDENUM, RHODIUM, AND TUNGSTEN
Two x-ray cameras are described which can be used to very high temperatures. One of these is a Debye-Scherrer camera after the model of Westgren in which electric current for hearing passes through the specimen itself, and this camera has been used up to 3100 deg C. In the application of this camera to Cr, Rh, Ru, and W, only the room temperature modifications were detected, while for Hf photographs were obtained of the Kigh temperature b.c.c, modification. The other camera is of the symmetrical parafocusing type with a refractory metal heater surrounding the specimen. The specimen, which is in the form of a block of the material under study, has a small hole drilled in it which forms effectively a black body cavity for temperature measurement. This camera has been used to determine accurately the temperature variation of the lattice parsnneter of Mo up to 1733 deg C. (auth)
- Research Organization:
- Oxford Univ.
- NSA Number:
- NSA-17-029353
- OSTI ID:
- 4694007
- Journal Information:
- J. Less-Common Metals, Vol. Vol: 5; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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