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Title: Method for wetting a boron alloy to graphite

Abstract

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.

Inventors:
Issue Date:
Research Org.:
Los Alamos National Lab., NM (USA)
OSTI Identifier:
7014624
Patent Number(s):
-US-A6087932
Assignee:
TIC; ERA-14-001154; EDB-88-185047
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 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-)

Citation Formats

Storms, E.K. Method for wetting a boron alloy to graphite. United States: N. p., 1987. Web.
Storms, E.K. Method for wetting a boron alloy to graphite. United States.
Storms, E.K. Fri . "Method for wetting a boron alloy to graphite". United States.
@article{osti_7014624,
title = {Method for wetting a boron alloy to graphite},
author = {Storms, E.K.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {8}
}