Growth morphology and crystallography of precipitate in a new high-temperature structural intermetallic Ti–40Al–10Fe

2016 ◽  
Vol 69 ◽  
pp. 62-73 ◽  
Author(s):  
H.W. Liu ◽  
M.F. Xian ◽  
J.Y. Huang ◽  
G.C. Su ◽  
J.W. Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Growth Morphology ◽  
Structural Intermetallic

Surfactant-Mediated Growth of Ge/Si(001) Interface Studied by XPD

1998 ◽  
Vol 05 (01) ◽  
pp. 157-161 ◽  
Author(s):  
R. Gunnella ◽  
P. Castrucci ◽  
N. Pinto ◽  
P. Cucculelli ◽  
I. Davoli ◽  
...  
Keyword(s):  
High Temperature ◽  
Auger Electron ◽  
Layer Growth ◽  
Layer By Layer ◽  
Growth Morphology ◽  
High Quality ◽  
X Ray ◽  
Photoelectron Diffraction ◽  
Quality Degradation ◽  
Cap Layer

The influence of Sb as a surfactant on the formation of Si/Ge interface is studied by means of XPD (X-ray photoelectron diffraction) and AED (Auger electron diffraction) from Ge and Si core levels. The technique employed is particularly suitable for checking the film tetragonal distortion, the growth morphology and the sharpness of the interface. We found a layer by layer growth mode for 3 ML of Ge on Si(001) and related values of strain of the film close to the value predicted by the elastic theory which enforces the use of such a surfactant to obtain high quality and sharp heterostructures. In addition, studying the influence of 3 ML of the Si cap layer on the 3 ML Ge, we obtain no indication of Ge segregation into the Si cap layer. Finally, evidences of quality degradation after high temperature (T > 600° C ) annealing are shown.

Selecting high-temperature structural intermetallic compounds: The engineering approach

JOM ◽  
1989 ◽  
Vol 41 (9) ◽  
pp. 12-17 ◽  
Author(s):  
D. L. Anton ◽  
D. M. Shah ◽  
D. N. Duhl ◽  
A. F. Giamei
Keyword(s):  
High Temperature ◽  
Intermetallic Compounds ◽  
Engineering Approach ◽  
Structural Intermetallic

Directions in High Temperature Intermetallics Research

1988 ◽  
Vol 133 ◽  
Author(s):  
Dennis M. Dimiduk ◽  
Daniel B. Miracle
Keyword(s):  
High Temperature ◽  
Air Force ◽  
Evolutionary Process ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Paper Briefly ◽  
Research Directions ◽  
Intermetallic Materials ◽  
Turbine Performance ◽  
Structural Intermetallic

ABSTRACTStructural intermetallic materials have undergone an evolutionary process whereby some of the materials could provide major payoffs in gas turbine engines. This maturation of select intermetallic systems has provided significant hope for making still greater advances in turbine performance through further developments in other intermetallic materials. The same maturation process has highlighted specific limitations and requirements which are key to the utilization of intermetallic systems. This paper briefly reviews some critical ground rules for high temperature intermetallics development and identifies research directions being pursued by the Air Force for advancing intermetallic materials.

High-Temperature Mechanical Spectrometer for Internal Friction Measurements

2009 ◽  
Vol 423 ◽  
pp. 89-95 ◽  
Author(s):  
P. Simas ◽  
José San Juan ◽  
Robert Schaller ◽  
M.L. Nó
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Internal Friction ◽  
Torsion Pendulum ◽  
Dynamic Shear ◽  
Shear Elastic Modulus ◽  
Computer Controlled ◽  
Friction Measurements ◽  
Structural Intermetallic ◽  
Different Parts

A new high temperature mechanical spectrometer, based on an inverted torsion pendulum, has been constructed for the measurement of the internal friction and the dynamic shear elastic modulus in two different working modes: (a) as a function of temperature (300 – 1800 K) at imposed frequency, during heating or cooling; and (b) as a function of frequency (10-3 – 10 Hz) in isothermal conditions. The whole installation is computer controlled by a dedicated software specifically developed. We describe the different parts of this new installation, as well as its performances in both temperature and frequency through an original example study on a high temperature structural intermetallic of Fe-Al.

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