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Powder Metallurgy of Raney Nickel.


PB261334

Publication Date 1976
Personal Author O'Hare, S. A.; O'Brien, W. L.; Worthington, R. B.; Mauser, J. E.
Page Count 22
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 MN/sq m. Sintering in an inert atmosphere from 575 to 850C caused a volume increase which is attributed to a solid state reaction between Al and Ni sub 2 Al sub 3 phases. The reaction is: 3Al + Ni sub 2 Al sub 3 yields 2Ni Al sub 3. A thermal pretreatment of 70 hours at 700C was required to prevent this reaction from occurring during sintering. Density and porosity was a function of compacting pressure and sintering temperature were determined after a thermal pretreatment of the powder.
Keywords
  • Powder metallurgy
  • Aluminum alloys
  • Catalysts
  • Nickel containing alloys
  • Nickel
  • Powder alloys
  • Compacting
  • Intermetallics
  • Sintering
  • Raney nickel
  • Aluminum alloy 42Ni
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 94G - Manufacturing Processes & Materials Handling
  • 71N - Nonferrous Metals & Alloys
Corporate Authors Bureau Of Mines, Albany, Oreg. Albany Metallurgy Research Center.
Document Type Technical Report
Title Note Rept. of investigations 1976.
NTIS Issue Number 197707
Powder Metallurgy of Raney Nickel.
Powder Metallurgy of Raney Nickel.
PB261334

  • Powder metallurgy
  • Aluminum alloys
  • Catalysts
  • Nickel containing alloys
  • Nickel
  • Powder alloys
  • Compacting
  • Intermetallics
  • Sintering
  • Raney nickel
  • Aluminum alloy 42Ni
  • Bureau of Mines
  • 94G - Manufacturing Processes & Materials Handling
  • 71N - Nonferrous Metals & Alloys
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