Method for wetting a boron alloy to graphite
A method is provided for wetting a graphite substrate and spreading a a boron alloy over the substrate. The wetted substrate may be in the form of a needle for an effective ion emission source. The method may also be used to wet a graphite substrate for subsequent joining with another graphite substrate or other metal, or to form a protective coating over a graphite substrate. A noneutectic alloy of boron is formed with a metal selected from the group consisting of nickel (Ni), palladium (Pd), and platinum (Pt) with excess boron, i.e., and atomic percentage of boron effective to precipitate boron at a wetting temperature of less than the liquid-phase boundary temperature of the alloy. The alloy is applied to the substrate and the graphite substrate is then heated to the wetting temperature and maintained at the wetting temperature for a time effective for the alloy to wet and spread over the substrate. The excess boron is evenly dispersed in the alloy and is readily available to promote the wetting and spreading action of the alloy. 1 fig.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- TIC; ERA-14-001154; EDB-88-185047
- Patent Number(s):
- PATENTS-US-A6087932
- OSTI ID:
- 7014624
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON ALLOYS
HEAT TREATMENTS
GRAPHITE
WETTABILITY
NICKEL ALLOYS
PALLADIUM ALLOYS
PLATINUM ALLOYS
INVENTIONS
ION BEAMS
KINETICS
PHASE TRANSFORMATIONS
SURFACES
TEMPERATURE DEPENDENCE
WETTING AGENTS
ALLOYS
BEAMS
CARBON
ELEMENTAL MINERALS
ELEMENTS
MINERALS
NONMETALS
PLATINUM METAL ALLOYS
SURFACTANTS
360603* - Materials- Properties
360601 - Other Materials- Preparation & Manufacture
656003 - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)