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Author : John D. Buckley
Publisher : Unknown
Page : 32 pages
File Size : 44,7 Mb
Release : 1962
Category : Oxide minerals
ISBN : UIUC:30112106689612
Author : Anonim
Publisher : Unknown
Page : 354 pages
File Size : 42,7 Mb
Release : 1969
Category : Electronic
ISBN : MINN:31951000846232I
Author : Anonim
Publisher : Unknown
Page : 732 pages
File Size : 51,6 Mb
Release : 1980
Category : Aeronautics
ISBN : UIUC:30112075601283
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : Alan Arias
Publisher : Unknown
Page : 88 pages
File Size : 52,5 Mb
Release : 1964
Category : Heat
ISBN : UIUC:30112106866798
Zirconium oxide or Zirconia has a melting point of about 27000, is resistant to chemical attack by acids and bases, is very stable at high temperatures in oxidizing atmospheres, and is inert when in contact with most metals at high temperatures. In addition, zirconia is relatively inexpensive and abundant. These characteristics of zirconia would make it a very satisfactory material for many high-temperature applications, were it not for the fact that pure zirconia undergoes an allotropic transformation from tetragonal to monoclinic on cooling through a temperature range in the neighborhood of 900 C. This transformation takes place with a volume increase of about 3 percent. During the reverse transformation near 11000 C on heating, zirconia shrinks by about the same amount. The large anisotropic volume changes associated with the transformation cause bodies made from pure zirconia to disintegrate during their manufacture or when in use. In practice, this difficulty is circumvented by adding small amounts of certain Oxides, such as calcia, magnesia, yttria, etc., to zirconia. Depending on the kind and amount of oxide added to the zirconia, the high-temperature crystal structure of the combination is totally or partially retained on cooling, and the allotropic transformation is also totally or partially suppressed. This so-called stabilized zirconia performs satisfactorily in many high-temperature applications, but the addition of stabilizing oxides also introduces some undesirable features, such as an increase in the thermal-expansion coefficient, a lowering of the melting point, and, for some types of stabilized zirconia, a tendency to disintegrate on prolonged thermal cycling. A zirconia-base material combining the high-temperature properties of pure zirconia without the disadvantages associated with the use of stabilizers would be highly desirable.
Author : John D. Buckley
Publisher : Unknown
Page : 40 pages
File Size : 55,5 Mb
Release : 1964
Category : Heat exchangers
ISBN : UIUC:30112106867382
Author : Anonim
Publisher : Unknown
Page : 1014 pages
File Size : 48,6 Mb
Release : 1963
Category : Electronic
ISBN : CHI:101406608
Author : Anonim
Publisher : Unknown
Page : 1160 pages
File Size : 46,5 Mb
Release : 1962
Category : Government publications
ISBN : OSU:32435023346760
Author : Anonim
Publisher : Unknown
Page : 1300 pages
File Size : 42,9 Mb
Release : 1966
Category : Nuclear energy
ISBN : UOM:39015023496824
Author : United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher : Unknown
Page : 258 pages
File Size : 54,8 Mb
Release : 1963
Category : Aeronautics
ISBN : CORNELL:31924004392746
Author : United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Publisher : Unknown
Page : 260 pages
File Size : 42,7 Mb
Release : 1964
Category : Aeronautics
ISBN : STANFORD:36105113773431
Author : United States. Superintendent of Documents
Publisher : Unknown
Page : 1250 pages
File Size : 46,7 Mb
Release : 1979
Category : United States
ISBN : STANFORD:36105022657527
Author : United States. Superintendent of Documents
Publisher : Unknown
Page : 1248 pages
File Size : 47,9 Mb
Release : 1961
Category : Government publications
ISBN : WISC:89038149167
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 42,8 Mb
Release : 1963
Category : Government publications
ISBN : UCR:31210023919168
Author : Anonim
Publisher : Unknown
Page : 604 pages
File Size : 47,6 Mb
Release : 1963-03
Category : Nuclear energy
ISBN : PSU:000047758384
Author : John D. Buckley
Publisher : Unknown
Page : 50 pages
File Size : 47,9 Mb
Release : 1969
Category : Hafnium oxide
ISBN : UIUC:30112106876979
