Elastic properties of high-alumina ceramics at low temperatures

1979 ◽  
Vol 36 (3) ◽  
pp. 159-160
Author(s):  
N. S. Kostyukov ◽  
�. V. Pozdeeva ◽  
A. A. Botaki ◽  
V. L. Ul'yanov
Keyword(s):  
Elastic Properties ◽  
Low Temperatures ◽  
High Alumina ◽  
Alumina Ceramics

Elastic properties of high-alumina ceramics irradiated with neutrons

1980 ◽  
Vol 37 (5) ◽  
pp. 261-262
Author(s):  
N. S. Kostyukov ◽  
E. V. Pozdeeva ◽  
A. A. Botaki ◽  
V. L. Ul'yanov
Keyword(s):  
Elastic Properties ◽  
High Alumina ◽  
Alumina Ceramics

Machining and Wear of High-Alumina Ceramics for Structural Applications

2009 ◽  
Vol 409 ◽  
pp. 137-144 ◽  
Author(s):  
Stojana Veskovic-Bukudur ◽  
Tanja Leban ◽  
Milan Ambrozic ◽  
Tomaž Kosmač
Keyword(s):  
Grain Size ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Direct Relationship ◽  
Bending Strength ◽  
High Alumina ◽  
Alumina Ceramics ◽  
Large Area ◽  
Structural Applications ◽  
Worn Surfaces

The wear resistances of four standard-grade high-alumina ceramics were evaluated and related to their machining ability. Three of the material grades contained 96% of alumina and 4% of either calcium silicate, or magnesium silicate, or manganese titanate in the starting-powder composition. The nominal alumina content in the fourth material was 99.7%. The specimens were fabricated using a low-pressure injection-molding forming technique, followed by thermal de-binding and sintering. After sintering the four materials differ significantly in their grain size, bending strength and Vickers hardness. No direct relationship between the microstructural parameters and the mechanical properties was found, but there was a grain-size dependence of the surface finish after grinding under industrial conditions. The two silicate-containing ceramics exhibited considerably higher wear resistances than the two silicate-free ceramics, but no direct relationship between the abrasive wear rate during grinding and the cutting time was observed. The cutting ability represents a valuable material characteristic for industrial practice, but it should not be directly used for predicting the wear rate during grinding. Quantitative differences in the cutting time and abrasive wear rate were manifested in the different topographies of the worn surfaces. Cutting resulted in relatively large area fractions of plastically deformed surfaces, whereas pullouts dominated the worn surfaces after grinding.

Elastic properties of amorphous and crystalline B1−xCx and boron at low temperatures

1998 ◽  
Vol 270 (1-2) ◽  
pp. 1-15 ◽  
Author(s):  
P.A Medwick ◽  
B.E White, Jr. ◽  
R.O Pohl
Keyword(s):  
Elastic Properties ◽  
Low Temperatures

Premetallizing of high alumina ceramics

1985 ◽  
Vol 11 (4) ◽  
pp. 135
Author(s):  
G. Visomblin ◽  
D. Tchoubar
Keyword(s):  
High Alumina ◽  
Alumina Ceramics
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