Development of Microwave Sintered Graphite-Cubic Boron Nitride (CBN) Reinforced Aluminum Hybrid Composite for Heat Sink Application

Project: Research

Project Details

Description

Aluminum matrix composites are gaining attention as light weight heat sink material. Graphite is an attractive reinforcement for Aluminum matrix not only because of excellent combination of high thermal conductivity with very low coefficient of thermal expansion but also for the excellent machinability possessed by the composite. But those advantages are offset by the interfacial reaction product (Aluminum Carbide) which reduces the thermal conductivity and also by the weak mechanical strength of the composite. Due to low processing temperatures, Powder Metallurgy can synthesize composites without interfacial reaction. The strength of the composite can be improved by hybridizing graphite reinforced aluminum matrix with cubic boron nitride nanoparticles. Moreover, microwave sintering can produce fine microstructures and better properties in powder metallurgy products at low cost. However, there is no effort reported in the open literature to develop hybrid heat sink composites with a good combination of thermal and mechanical properties. Accordingly, the aim of this project is to develop Aluminum hybrid composite reinforced with graphite and Cubic Boron Nitride using simple blend-press-microwave sinter powder metallurgy route followed by hot extrusion. Effect of volume fractions of reinforcements and processing parameters on the microstructure, mechanical, and thermal properties of the developed composites will be studied. Parameters will be optimized to identify the suitable volume fraction and process parameters leading to improved properties of the Al-Graphite-CBN hybrid composite. The proposed project duration is 30 working months and the total budget is 299,000 Saudi Riyal.
StatusFinished
Effective start/end date15/04/1915/04/22

Fingerprint

Explore the research topics touched on by this project. These labels are generated based on the underlying awards/grants. Together they form a unique fingerprint.