Studies of the hydrogen passivation of silicon grain boundaries

1981 ◽  
Vol 52 (2) ◽  
pp. 1050-1055 ◽  
Author(s):  
C. H. Seager ◽  
D. S. Ginley
Keyword(s):  
Grain Boundaries ◽  
Hydrogen Passivation

Hydrogen passivation of grain boundaries in polycrystalline gallium arsenide

1983 ◽  
Vol 54 (2) ◽  
pp. 1154-1155 ◽  
Author(s):  
S. J. Pearton ◽  
A. J. Tavendale
Keyword(s):  
Gallium Arsenide ◽  
Grain Boundaries ◽  
Hydrogen Passivation

Morphology, Distribution and Identification of Micro-Constituents Along Grain Boundaries in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 176-177
Author(s):  
D. E. Fornwalt ◽  
A. R. Geary ◽  
B. H. Kear
Keyword(s):  
Electron Microscope ◽  
Grain Boundaries ◽  
Volume Fraction ◽  
Rupture Life ◽  
Stress Rupture ◽  
High Volume ◽  
Precipitate Morphology ◽  
Stress Rupture Life ◽  
Nickel Base ◽  
Scanning Electron

A systematic study has been made of the effects of various heat treatments on the microstructures of several experimental high volume fraction γ’ precipitation hardened nickel-base alloys, after doping with ∼2 w/o Hf so as to improve the stress rupture life and ductility. The most significant microstructural chan§e brought about by prolonged aging at temperatures in the range 1600°-1900°F was the decoration of grain boundaries with precipitate particles.Precipitation along the grain boundaries was first detected by optical microscopy, but it was necessary to use the scanning electron microscope to reveal the details of the precipitate morphology. Figure 1(a) shows the grain boundary precipitates in relief, after partial dissolution of the surrounding γ + γ’ matrix.

Sign in / Sign up

Export Citation Format

Share Document