National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

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

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