Wetting and adhesion of Ni-Al alloys on α-Al2O3 single crystals

1995 ◽  
Vol 30 (14) ◽  
pp. 3619-3624 ◽  
Author(s):  
V. Merlin ◽  
N. Eustathopoulos
Keyword(s):  
Single Crystals ◽  
Al Alloys ◽  
Α Al2o3

On the nature of the violet luminescence in quenched α - Al2O3 single crystals

1980 ◽  
Vol 62 (1) ◽  
pp. K85-K87 ◽  
Author(s):  
A. V. Pujats ◽  
M. J. Springis ◽  
J. A. Valbis
Keyword(s):  
Single Crystals ◽  
Violet Luminescence ◽  
Α Al2o3

Compression Test and Plastic Strain of α-Al2O3 Single Crystals

2005 ◽  
Vol 80 (7) ◽  
pp. 1711-1714 ◽  
Author(s):  
Jean Pierre Rivière ◽  
Jacques Castaing
Keyword(s):  
Plastic Strain ◽  
Single Crystals ◽  
Compression Test ◽  
Α Al2o3

Grazing-Incidence XAFS Study of Aqueous Zn(II) Sorption on α-Al2O3 Single Crystals

2001 ◽  
Vol 244 (2) ◽  
pp. 239-244 ◽  
Author(s):  
Thomas P. Trainor ◽  
Jeffrey P. Fitts ◽  
Alexis S. Templeton ◽  
Daniel Grolimund ◽  
Gordon E. Brown
Keyword(s):  
Single Crystals ◽  
Grazing Incidence ◽  
Α Al2o3

Luminescence of color centers in α-Al2O3 single crystals

1995 ◽  
Vol 62 (3) ◽  
pp. 585-588 ◽  
Author(s):  
V. V. Arutyunyan ◽  
A. K. Babayan ◽  
A. N. Belskii ◽  
V. A. Gevorkyan ◽  
V. N. Makhov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Color Centers ◽  
Α Al2o3

Specific features of luminescence of radiation-colored α-Al2O3 single crystals

2004 ◽  
Vol 38 (4-6) ◽  
pp. 451-454 ◽  
Author(s):  
V.S. Kortov ◽  
S.V. Nikiforov ◽  
I.I. Milman ◽  
E.V. Moiseykin
Keyword(s):  
Single Crystals ◽  
Α Al2o3

The geometry of fractures caused by cleavage of α-Al2O3 single crystals

1973 ◽  
Vol 8 (4) ◽  
pp. 507-511 ◽  
Author(s):  
H. S. Bagdasarov ◽  
G. V. Berezhkova ◽  
V. G. Govorkov ◽  
E. P. Kozlovskaya ◽  
E. A. Fedorov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Α Al2o3 ◽  
Geometry Of Fractures

The Oxidation off Iron, Nickel and Cobalt-Base Alloys Containing Aluminum

CORROSION ◽  
1965 ◽  
Vol 21 (10) ◽  
pp. 316-326 ◽  
Author(s):  
W. C. HAGEL
Keyword(s):  
Weight Gain ◽  
Internal Oxidation ◽  
Outer Layer ◽  
Al Alloys ◽  
Reaction Products ◽  
Parabolic Growth ◽  
Iron Nickel ◽  
Α Al2o3 ◽  
Cobalt Base ◽  
Continuous Weight

Abstract By conducting continuous weight-gain measurements from 500 to 1300 C on a variety of Fe-Al, Fe-Cr-Al, Ni-Al and Co-Al alloys in oxygen at 100 torr and examining the reaction products which form, reasons for the enexpected ineffectiveness of preferential aluminum oxidation have been explored. With Fe-4.4 percent Al and Fe-12 percent Al, there are two different regions of parabolic growth- these are associated with the appearance of γ-A12O3 below 900 C and α-Al2O3 above. The latter is normally more protective but possesses a greater tendency for cracking and spalling; adding 24.6 percent chromium promotes its formation at lower temperatures. With Ni-5.0 percent Al, two displaced regions are also found; here, nickel penetrates alumina to provide intermediate NiO · Al2O3 and an outer layer of NiO. With Co-4 percent Al, somewhat less cobalt penetrates γ-Al2O3 to provide CoQ · Al2O3 and an outer layer of Co3O4. When both CoO and α-Al2O3 are stable phases, the latter grows mainly by internal oxidation and offers little protection.

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