Abstract
The development of electroless coatings on various substrates has gained much interest among researchers for the sake of improved properties. However, the coating on ceramic particles as a source of reinforcement is still a challenge for the researchers and requires a good comprehension of fundamentals since the coating thickness relies upon many parameters. Particularly the sensitization and activation conditions are more important for the creation of an ideal environment to draw metallic ions as a coating layer. Therefore, this paper examines the role of sensitization and activation conditions on the viability of nickel coating on the alumina particles of an average size of 50 nm. A comparison is made between two environments, namely individual and blended activations in the preparation of coated particles. Characterization studies are also presented to support the discussion.
Highlights
Composites are one of the key areas of research and grown in an exponential way as these materials possess lightweight and high strength in economic applications
Effect of Sensitization Conditions To study the impact of sensitization and activation conditions, two conditions we investigated in the present study
It was observed that the diffraction peaks in Sample B and C were broad when compared with Sample A, and a shoulder has been observed in the diffraction peaks at 2-Theta angle 40-50
Summary
Composites are one of the key areas of research and grown in an exponential way as these materials possess lightweight and high strength in economic applications. Metal Matrix composites (MMCs) have made a great impact in replacing the conventional monolithic materials. Alumina is the most commonly used material in modern MMCs as a source of reinforcement, given its desirable characteristics [1,2,3]. The preparation of a composite material needs special attention in achieving (i) low porosity (ii) uniform distribution (iii) wettability and (iv) matrix – reinforcement interactions for the enhanced properties [4]. To promote enhanced interactions between matrix and reinforcement, coating the ceramic particulates with metal is found to be one of the prominent methods in recent times [4,5,6,7,8,9]
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