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Powder metallurgy of raney nickel.

Authors
O'Hare-SA; O'Brien-WL; Worthington-RB; Mauser-JE
Source
Albany OR: U.S. Department of the Interior, Bureau of Mines, RI 8182, 1976 Jan; :1-12
Link
NIOSHTIC No.
10007816
Abstract
Powder metallurgy processing of commercial raney nickel powders was examined. The typical angular particle shape, in conjunction with aluminum present in a eutectic phase, facilitated interlocking leading to excellent green strength after compaction. Density and porosity as influenced by the compacting pressure were studied over the range of 37.5 to 207 meganewton per square meter (mn/m2). Sintering in an inert atmosphere from 575 deg to 850 deg C caused a volume increase which is attributed to a solid-state reaction between al and Ni2Al3 phases. The reaction is 3Al + Ni2Al3->2NiAl3. A thermal pretreatment of 70 hours at 700 deg C was required to prevent this reaction from occurring during sintering. Density and porosity as a function of compacting pressure and sintering temperature were determined after a thermal pretreatment of the powder.
Keywords
Metallurgical-processes; Metallurgy; Metals; Mineral-processing
CAS No.
7440-02-0
Publication Date
19760101
Document Type
IH; Report of Investigations
Fiscal Year
1976
NTIS Accession No.
PB-261334
NTIS Price
A03
Identifying No.
RI-8182
NIOSH Division
ALRC
Source Name
Albany OR: U.S. Department of the Interior, Bureau of Mines, RI 8182
State
OR
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