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Title: Methods for preparation of extremely fine superalloy powders and fabrication to superalloy parts. Final report, October 1, 1995--February 15, 1998

Abstract

The use of reducing agents such as sodium borohydride have been used in a wide variety of chemical reactions from organic compounds synthesis to metal production. In order to reduce metal ions into the metallic state, the solution electrochemical potential must be sufficiently low to allow the metal to accept electrons from the reducing agent. One information source that gives important information regarding the conditions necessary for spontaneous aqueous nickel metal reduction is the electroless nickel plating literature. Although nickel is not the only desired metal, it provides an important starting point in metal reduction, and it is useful because of its resistance to corrosion. The electroless nickel plating literature indicates that sodium hypophosphite, sodium borohydride, and hydrazine are all used as reductants. Sodium hypophosphite is usually used at 30--95 C in a bath containing dissolved nickel sulfate and other additives such as oxalic acid and ammonium chloride. Sodium borohydride is usually used with sodium hydroxide in a similar temperature range. Hydrazine is also used with sodium hydroxide in a similar temperature range. However, in order to make the transition from electroless nickel deposition to spontaneous metal powder production requires different conditions. In this research program, a number of differentmore » conditions were examined to determine optimum conditions for the production of metal and metal alloy powders in aqueous solutions.« less

Authors:
Publication Date:
Research Org.:
Materials Research Inc., Santa Barbara, CA (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
631246
Report Number(s):
DOE/EE/15388-T1
ON: DE98007028; TRN: AHC29813%%118
DOE Contract Number:  
FG01-95EE15388
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1998]
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; PROGRESS REPORT; SYNTHESIS; HEAT RESISTING ALLOYS; POWDERS; REDUCING AGENTS; IRON ALLOYS; NICKEL ALLOYS

Citation Formats

Natesh, R. Methods for preparation of extremely fine superalloy powders and fabrication to superalloy parts. Final report, October 1, 1995--February 15, 1998. United States: N. p., 1998. Web. doi:10.2172/631246.
Natesh, R. Methods for preparation of extremely fine superalloy powders and fabrication to superalloy parts. Final report, October 1, 1995--February 15, 1998. United States. doi:10.2172/631246.
Natesh, R. Wed . "Methods for preparation of extremely fine superalloy powders and fabrication to superalloy parts. Final report, October 1, 1995--February 15, 1998". United States. doi:10.2172/631246. https://www.osti.gov/servlets/purl/631246.
@article{osti_631246,
title = {Methods for preparation of extremely fine superalloy powders and fabrication to superalloy parts. Final report, October 1, 1995--February 15, 1998},
author = {Natesh, R},
abstractNote = {The use of reducing agents such as sodium borohydride have been used in a wide variety of chemical reactions from organic compounds synthesis to metal production. In order to reduce metal ions into the metallic state, the solution electrochemical potential must be sufficiently low to allow the metal to accept electrons from the reducing agent. One information source that gives important information regarding the conditions necessary for spontaneous aqueous nickel metal reduction is the electroless nickel plating literature. Although nickel is not the only desired metal, it provides an important starting point in metal reduction, and it is useful because of its resistance to corrosion. The electroless nickel plating literature indicates that sodium hypophosphite, sodium borohydride, and hydrazine are all used as reductants. Sodium hypophosphite is usually used at 30--95 C in a bath containing dissolved nickel sulfate and other additives such as oxalic acid and ammonium chloride. Sodium borohydride is usually used with sodium hydroxide in a similar temperature range. Hydrazine is also used with sodium hydroxide in a similar temperature range. However, in order to make the transition from electroless nickel deposition to spontaneous metal powder production requires different conditions. In this research program, a number of different conditions were examined to determine optimum conditions for the production of metal and metal alloy powders in aqueous solutions.},
doi = {10.2172/631246},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {7}
}