Phase composition of high-alumina ceramics

V. A. Kopeykin; D. N. Poluboyarinov

doi:10.1007/bf01282876

Phase composition of high-alumina ceramics

Refractories ◽

10.1007/bf01282876 ◽

1960 ◽

Vol 1 (11-12) ◽

pp. 452-457 ◽

Cited By ~ 1

Author(s):

V. A. Kopeykin ◽

D. N. Poluboyarinov

Keyword(s):

Phase Composition ◽

High Alumina ◽

Alumina Ceramics

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Effect of phase composition and microstructure on the mechanical strength and thermal stability of high-alumina ceramics

Strength of Materials ◽

10.1007/bf01529632 ◽

1989 ◽

Vol 21 (2) ◽

pp. 174-180

Author(s):

F. Ya. Kharitonov ◽

E. Ya. Medvedovskii ◽

I. Kh. Moroz

Keyword(s):

Thermal Stability ◽

Phase Composition ◽

Mechanical Strength ◽

High Alumina ◽

Alumina Ceramics ◽

Thermal Stability Of

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The combination of two laser energy sources for surface modification of high alumina ceramics

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5059830 ◽

2001 ◽

Author(s):

D. Triatafyllidis ◽

L. Li ◽

F. H. Stott

Keyword(s):

Surface Modification ◽

Laser Energy ◽

High Alumina ◽

Energy Sources ◽

Alumina Ceramics

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Machining and Wear of High-Alumina Ceramics for Structural Applications

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.409.137 ◽

2009 ◽

Vol 409 ◽

pp. 137-144 ◽

Cited By ~ 3

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.

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