Pulsed electrodeposition of Ni-Mo alloys
The effect of pulsing the current on the composition, internal stress, and mechanical properties of Ni-Mo electrodeposits was investigated. The molybdenum content increased with increasing peak current density and to a lesser degree with decreasing duty cycle. A reduction in the internal stresses was explained in terms of the relaxation of those due to crystallite or fine grain coalescence during the off-time and an expansion of the surface layer when hydrogen diffused into it at the start of each on-time. The mechanical properties were improved by high-frequency pulse plating. Deposits consisting of alternate layers of different composition annealed at 300 C exhibited further improvement of their mechanical properties.
- Research Organization:
- Stevens Inst. of Tech., Hoboken, NJ (USA)
- OSTI ID:
- 6054406
- Report Number(s):
- AD-A-201526/1/XAB
- Resource Relation:
- Other Information: Pub. in Jnl. of the Electrochemical Society, Vol. 135, No. 5, 1100-1103(May 1988)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRODEPOSITED COATINGS
STRESSES
MOLYBDENUM ALLOYS
ELECTRODEPOSITION
NICKEL ALLOYS
COALESCENCE
CURRENT DENSITY
ELECTRIC CURRENTS
HYDROGEN
LAYERS
MECHANICAL PROPERTIES
PLATING
PULSES
RELAXATION
SURFACES
ALLOYS
COATINGS
CURRENTS
DEPOSITION
ELECTROLYSIS
ELEMENTS
LYSIS
NONMETALS
SURFACE COATING
360105* - Metals & Alloys- Corrosion & Erosion
360101 - Metals & Alloys- Preparation & Fabrication