The Compatibilities of Boron and Germanium

Item

Title
The Compatibilities of Boron and Germanium
Date
1969
Index Abstract
Coming Soon
Photo Quality
Complete
Report Number
AFML TR 69-258
Corporate Author
Air Force Materials Laboratory
Laboratory
Air Force Materials Laboratory
Extent
29
Identifier
AD0863815
Access Rights
Export Controls
Distribution Classification
1
Contract
Laboratory Research - No Contract
DoD Project
7353 - Characterization of Solid Phase and Interphase Phenomena in Crystalline Structures
DoD Task
None Given
DTIC Record Exists
No
Distribution Change Authority Correspondence
USAFML LTR
Distribution Conflict
No
Date Modified
Scanned by request 5/15/2008 submitted by a Private Citizen (No Known Affiliation)
Abstract
The salient features of the boron-germanium phase equilibrium diagram were deduced from X-ray diffraction, metallographic, thermal analysis, and electron microprobe studies on both sintered and melted alloys. The system can be characterized as a classical monotecticeutectic with no intermediate phases. The occurrence of hypomonotectic boron crystals and boron crystals grown from a germanium melt indicates a slight solubility of germanium in solid boron and of boron in liquid germanium at the monotectic temperature. X-ray diffraction, thermal analysis, and metallographic studies indicate that the germanium-rich liquid freezes as essentially pure germanium and that the solid solubility of germanium in boron and of boron in germanium is virtually nil at the eutectic temperature. The minute quantity of boron that does dissolve in solid germanium does so substitutionally with a 0.01 to 0.02 volume percent contraction of the germanium lattice. These results indicate that germanium may have utility as a boron diffusion barrier for boron fiber-reinforced metal-matrix composites.
Report Availability
Full text available
Date Issued
1969-10
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Creator
Bidwell, Lawrence R.
Media
AFMLTR69-258.pdf