Studies on microstructure and crystallization behavior of electroless nickel-high phosphorus coatings

Authors
Jiang, TX Wu, HH
Citation
Tx. Jiang et Hh. Wu, Studies on microstructure and crystallization behavior of electroless nickel-high phosphorus coatings, CHEM J CH U, 22(6), 2001, pp. 976-979
Citations number
14
Categorie Soggetti
Chemistry
Journal title
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN journal
02510790 → ACNP
Volume
22
Issue
6
Year of publication
2001
Pages
976 - 979
Database
ISI
SICI code
0251-0790(200106)22:6<976:SOMACB>2.0.ZU;2-6
Abstract
The electroless nickel-high phosphorus coatings with 12.8% P(mass fraction) have been deposited from acidic bath containing mixed complexing agents, T he microstructure and crystallization behavior of the deposits have been ch aracterized by AFM, TEM, DSC and XRD. The results show that the as-plated d eposits exhibit a rounded-mound topography and have an amorphous structure. The deposits crystallize into metastable phase Ni5P2 at 343.8 degreesC, wh ich are subsequently transformed into stable phases of nickel and Ni3P crys tallites at 440.4 degreesC, This behavior is apparently different from that of the deposits produced from alkaline ethanolamine baths.