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Preparation of nickel-coated powders as precursors to reinforce MMCs.
- Source :
- Journal of Materials Science; Oct2000, Vol. 35 Issue 19, p4763-4768, 6p
- Publication Year :
- 2000
-
Abstract
- The preparation of nickel-coated ceramic particles as precursors for MMC fabrication was studied. Al<subscript>2</subscript>O<subscript>3</subscript> and SiC powders of three different particle sizes were successfully coated with Ni using an electroless metal plating technique. Uniform and continuous nickel films were deposited on both, alumina and silicon carbide powders, with a final composition ranging from 1.6 to 1.9wt% phosphorus, 18–21wt% of metallic nickel and the balance is ceramic. XRD showed that the Ni-P deposit was predominantly amorphous. However, after heat treatment, the metallic deposits crystallize into Ni and Ni<subscript>3</subscript>P phases, as confirmed by DSC analyses. Preliminary results showed that the use of Ni-coated powders enhances the wettability between the matrix and ceramic phase when processing particulate MMCs by infiltration techniques. The coating promoted easy metal flow through the preform, compared to the non-infiltration behavior of the uncoated counterpart samples. [ABSTRACT FROM AUTHOR]
- Subjects :
- NICKEL
CERAMIC materials
ELECTROLESS plating
NICKEL films
CERAMIC powders
Subjects
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 35
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 52539663
- Full Text :
- https://doi.org/10.1023/A:1004860326071