PHASE TRANSFORMATION AT HIGH TEMPERATURES IN HAFNIA AND ZIRCONIA
Journal Article
·
· Science See Saiensu
Phase transformation curves for HfO/sub 2/ and ZrO/sub 2/ were made. Transformation hysteresis is discussed. The trans formation of monoclinic to tetragonal as temperature increases occurs over the range 1000 deg to 1200 deg C in ZrO/sub 2/, and 1500 deg to 1600 deg C in HfO/sub 2/. With decreasing temperature the transition back to monoclinic occurs from 970 deg to 750 deg C in ZrC/sub 2/ and 1550 deg to 1450 deg C in HfO/sub 2/. These transformations have been visually observed in ZrO/sub 2/, but not in HfO/sub 2/. (auth)
- Research Organization:
- Wright Air Development Center, Wright-Patterson AFB, Ohio
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-027876
- OSTI ID:
- 4696048
- Journal Information:
- Science See Saiensu, Journal Name: Science See Saiensu Vol. Vol: 140; ISSN SIENDS1
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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