The Relationship Between Grain Sizes And Hardness Of Sintered Alumina Product

Loh , Yin Kuan (2008) The Relationship Between Grain Sizes And Hardness Of Sintered Alumina Product. Project Report. UTeM, Melaka,Malaysia. (Submitted)

	PDF (24 Pages) The_Relationship_Between_Grain_Sizes_And_Hardness_Of_Sintered_Alumina_Product_Loh_Yin_Kuan_TP810.5.L63_2008_-_24_Pages.pdf - Submitted Version Download (1MB)
	PDF (Full Text) The_Relationship_Between_Grain_Sizes_And_Hardness_Of_Sintered_Alumina_Product_Loh_Yin_Kuan_TP810.5.L63_2008.pdf - Submitted Version Restricted to Registered users only Download (13MB)

Abstract

Ceramic is a glazed or unglazed body of crystalline or partly crystalline structure, or of glass, which body is produced from essentially inorganic, non-metallic substances and either is formed from a molten mass which solidifies on cooling, or is formed and simultaneously or subsequently matured by the action of the heat. Alumina is one of the ceramic material formed of bodies with non-naturally occurring material is called new ceramic or modern ceramic. Alumina was given attention in this study of particles size and its hardness due to its most widely used as the synthetic raw materials for ceramics with excellent heat and corrosion resistance property. Thus, it has a variety of applications are being developed for machine part used in a lower temperature range, such as cutting tools, pumps and valves. Objectives of this study are to produce fine and narrow particles size distribution of alumina through planetary ball milling and, correlate between particle size and hardness of the sintered alumina, the changes in grain structure of alumina products will also be discussed. The main factor to study of particles sizes is correlated with the milling time, and the hardness of sintered alumina is corresponding to the grain size and microstructure. The seven alumina specimen with different milled time is fragmented on impart by mill ball. The milled powder is then compacted by the hydraulic pellet press and followed by sintering process. The changes in particles size and hardness of sintered alumina can be investigated via scanning electron microscope and hardness test respectively to identical the effect of grains size on hardness. As conclusion, increasing milling time resulted in a finer grain sizes and increase in hardness of sintered alumina. The Planetary ball mill cannot well-perform to fragment the particles sizes uniformly due to trapped powder between vial and ball milling. Finally, mechanical properties of milled particle size and hardness of sintered alumina will be affected the application and quality of the product.

Actions (login required)

View Item