Abstract
Ceramic matrix composites reinforced with metals have been developed to overcome the intensive brittleness and lack of reliability of monolithic ceramics, with a view to introduce ceramics in structural parts used in severe environments such as rocket and jet engines, gas turbines for power plants, heat shields for space vehicles, fusion reactor first wall, aircraft brakes, heat treatment furnaces. In view of these the effects of Al-6%Si alloy particles on the ascast microstructure and properties of Tin Tailings ceramics matrix composites produced by powder metallurgy method have been studied. 5-30 weight percent Al-6%Si alloy particles were added. The results revealed that, addition of Al-6%Si alloy reinforcement increased the linear shrinkage, strength and impact energy with a decreased in density, porosity and hardness value. These increases in strength and impact energy are attributed to the uniform distribution and strong bonding of the soft metal phase in the hard ceramic matrix. These results show that better properties are achievable by addition of Al-6%Si alloy to Tin Tailings.
Highlights
Ceramic matrix composites (CMCs) as the name implies combine reinforcing ceramic or metal phases with a ceramic matrix to create materials with new and superior properties [1].V.S
CMCs have been developed to overcome the intensive brittleness and lack of reliability of monolithic ceramics, with a view to introduce ceramics in structural parts used in severe environments such as rocket and jet engines, gas turbines for power plants, heat shields for space vehicles, fusion reactor first wall, aircraft brakes, heat treatment furnaces, etc
The Tin tailings used in this work are dark brown, fine powder of particle size(64μm) The particles are not synthetic being obtained from the Tin mining field in Jos, Plateau State Nigeria Al-6%Si alloy used was produced and grinded into powder form using a ball mill and sieve to a particle size of (100μm) at the foundry shop of the Metallurgical and Materials Engineering department, Ahmadu Bello University Zaria, Nigeria
Summary
Ceramic matrix composites (CMCs) as the name implies combine reinforcing ceramic or metal phases with a ceramic matrix to create materials with new and superior properties [1]. The ceramic matrix (CMCs) used at high temperatures include silicon carbide, carbon, alumina, silica, zirconia and other elements. Tin tailings are waste product obtained from the beneficiation of tin ore in the mining industry. Previous research on this waste product show that the tailings are dark-brown in colour, can withstand temperature above 18000C, chemical analysis indicates that it contains principally Zirconia in the form of ZrO and silica having percentages of 68.7% and 11% respectively and it is very hard and brittle [5]. In order to increase the toughness and strength of Tin tailings for industrial and engineering applications, the present research which intends to add Al-Si alloy to Tin tailings and study its characteristic behaviour through microstructural and properties analysis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
