The Effect of Oxygen on the Thermal Stability of Si1−xGex Strained Layers Grown by Limited Reaction Processing

1991 ◽  
Vol 220 ◽  
Author(s):  
D. B. Noble ◽  
J. L. Hoyt ◽  
P. Kuo ◽  
W. D. Nix ◽  
J. F. Gibbons ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solid Solution ◽  
Oxygen Content ◽  
Low Oxygen ◽  
Strained Layers ◽  
High Oxygen Content ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Effect Of Oxygen ◽  
Content Support

ABSTRACTSi1−xGex layers containing 2×1020 oxygen atoms/cm3 exhibit an enhancement in thermal stability when compared to similar films (comparable Ge content and thickness) with 2 orders of magnitude less oxygen. X-ray measurements of the lattice constants in the strained films indicate that the oxygen does not substantially change the amount of strain in the layers. A prediction of the effect of oxygen based on solid solution strengthening theory is shown to be consistent with experimental annealing results. In addition, experimental measurements of slower misfit dislocation velocities in the layers with high oxygen content compared to those measured in films with low oxygen content, support the idea of solid solution strengthening. It is therefore likely that oxygen impedes the kinetics of dislocation formation.

Effect of Intermetallic Compounds on the Properties of Tantalum

1993 ◽  
Vol 322 ◽  
Author(s):  
P. Kumar ◽  
C.E. Mosheim ◽  
C.A. Michaluk
Keyword(s):  
Adverse Effect ◽  
Thermal Stability ◽  
Solid Solution ◽  
Functional Testing ◽  
Functional Tests ◽  
Method Evaluation ◽  
Solid Solution Strengthening ◽  
Excellent Corrosion Resistance ◽  
Solution Strengthening ◽  
Traditional Approaches

While pure tantalum has excellent corrosion resistance and formability, its high temperature properties and thermal stability are marginal for some intended applications. Traditional approaches for improving these properties have been dispersion and solid solution strengthening. Modifications of properties via an intermetallic precipitation was not considered until recently.Results of an on-going investigation on the processing and evaluation of silicidestrengthened tantalum are presented. Yttrium silicide-containing Tantalum samples were produced via the P/M method. Evaluation consisted of microstructural, mechanical, chemical and functional tests. Results were compared with those of commercially available tantalum. Intermetallics precipitates were found to be very potent in altering these properties.While the preliminary results are encouraging, extensive functional testing is required to assure that there is no unexpected adverse effect.

Effect of Oxygen on Phase Precipitation and Mechanical Functionality in Ti-29Nb-13Ta-4.6Zr

2010 ◽  
Vol 436 ◽  
pp. 179-184 ◽  
Author(s):  
Mitsuo Niinomi ◽  
Masaaki Nakai ◽  
Toshikazu Akahori ◽  
Harumi Tsutsumi
Keyword(s):  
Solid Solution ◽  
Titanium Alloys ◽  
Young’S Modulus ◽  
Martensite Phase ◽  
Phase Precipitation ◽  
Solid Solution Strengthening ◽  
Orthorhombic Martensite ◽  
Solution Strengthening ◽  
Effect Of Oxygen

Oxygen plays very important roles in titanium and its alloys. Solute oxygen in titanium alloys leads to solid solution strengthening, suppressing the precipitation of the athermal omegaor orthorhombic martensite phase, enhancing the formation of the -case, etc. The proper using oxygen is effective to improve the mechanical functionalities of titanium alloys. However, the role of oxygen in titanium alloys is still not well understood. Therefore, the effect of oxygen on the mechanical functionalities such as strength-ductility balance, hardness, and Young’s modulus in Ti-29nb-13Ta-4.6Zr was investigated.

The VO Defect in Electron Irradiated Czochralski Silicon

2014 ◽  
Vol 1004-1005 ◽  
pp. 293-296
Author(s):  
Li Li Cai ◽  
Hui Bin Wang ◽  
Cui Ju Feng ◽  
Gui Feng Chen
Keyword(s):  
Thermal Stability ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Oxygen Content ◽  
Irradiation Dose ◽  
Linear Increase ◽  
Interstitial Oxygen ◽  
Low Oxygen ◽  
High Oxygen Content ◽  
Czochralski Silicon

The Czochralski silicon (CZ-Si) samples were irradiated with 1.5 MeV electrons and annealed at 200 - 450 °C. It was investigated the effect of irradiation dose and interstitial oxygen content [Oi] on VO concentration by Fourier transform infrared spectroscopy (FTIR). The results show that VO concentration increases with irradiation dose but not linear increase. The interstitial oxygen content has no effect on VO concentration. The VO intensity increases firstly and then decreases after annealing in samples with low oxygen content. The VO disappears at 450 °C. In high oxygen content samples, VO exhibits thermal stability and disappears at 400 °C.

OLIN ALLOY C5218

Alloy Digest ◽  
2004 ◽  
Vol 53 (6) ◽  
Keyword(s):  
Solid Solution ◽  
Physical Properties ◽  
Tensile Properties ◽  
Bend Strength ◽  
Bronze Alloy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

Abstract Olin Alloy C5218 is a phosphor bronze alloy given both dispersion- and solid-solution strengthening for applications in the automotive connector market. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. Filing Code: CU-715. Producer or source: Olin Brass.

Lattice distortion as an estimator of solid solution strengthening in high-entropy alloys

2021 ◽  
pp. 110877
Author(s):  
Ankit Roy ◽  
Praveen Sreeramagiri ◽  
Tomas Babuska ◽  
Brandon Krick ◽  
Pratik K. Ray ◽  
...  
Keyword(s):  
Solid Solution ◽  
Lattice Distortion ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

scholarly journals Strength, Hardness, and Ductility Evidence of Solid Solution Strengthening and Limited Hydrogen Embrittlement in the Alloy System Palladium-Copper (Cu wt. % 5–25)

Hydrogen ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 262-272
Author(s):  
Sebastian DiMauro ◽  
Gabrielle Legall ◽  
Coleman Lubinsky ◽  
Monica Nadeau ◽  
Renee Tait ◽  
...  
Keyword(s):  
Solid Solution ◽  
Hydrogen Embrittlement ◽  
Copper Content ◽  
Vickers Microhardness ◽  
Copper Alloys ◽  
Alloy System ◽  
Weight Percent ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Palladium Copper Alloys

Strength, hardness, and ductility characteristics were determined for a series of palladium-copper alloys that compositionally vary from 5 to 25 weight percent copper. Alloy specimens subjected to vacuum annealing showed clear evidence of solid solution strengthening. These specimens showed, as a function of increasing copper content, increased yield strength, ultimate strength, and Vickers microhardness, while their ductility was little affected by compositional differences. Annealed alloy specimens subsequently subjected to exposure to hydrogen at 323 K and PH2 = 1 atm showed evidence of hydrogen embrittlement up to a composition of ~15 wt. % Cu. The magnitude of the hydrogen embrittlement decreased with increasing copper content in the alloy.

Effect of Hydrogen on the Development of Superplastic Deformation in the Submicrocrystalline Ti–6Al–4V Alloy

2016 ◽  
Vol 838-839 ◽  
pp. 344-349 ◽  
Author(s):  
Galina P. Grabovetskaya ◽  
Ekaterina N. Stepanova ◽  
Ilya V. Ratochka ◽  
I.P. Mishin ◽  
Olga V. Zabudchenko
Keyword(s):  
Solid Solution ◽  
Plastic Deformation ◽  
Flow Stress ◽  
Superplastic Deformation ◽  
Deformation Localization ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Hydrogenation Effect

Hydrogenation effect on the development of superplastic deformation in the submicrocrystalline Ti–6Al–4V alloy at temperatures (0.4–0.5)Тmelt is investigated. Hydrogenation of the submicrocrystalline Ti–6Al–4V alloy to 0.26 mass% during superplastic deformation is found to result in solid solution strengthening, plastic deformation localization, and as a consequence, decrease of the deformation to failure. Possible reasons for the decrease of the flow stress and increase of the deformation to failure in the submicrocrystalline Ti–6Al–4V–0.26H alloy during deformation under conditions of superplasticity and simultaneous hydrogen degassing from the alloy are discussed.

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