Investigation of mechanical properties based on grain growth and microstructure evolution of alumina ceramics during two step sintering process

14th International Symposium on Advanced Materials

Khan, U.A.^1 ; Hussain, A.^1 ; Shah, M.^1 ; Shuaib, M.^2 ; Qayyum, F.^1

Department of Mechanical Engineering, University of Engineering and Technology, Taxila

47050, Pakistan^1

Ibn-e-Seena Institute of Technology, Sector H-11, Islamabad, Pakistan^2

关键词: Alumina ceramic;    Micro-structure evolutions;    Relative density;    Scanning electron micrographs;    Sintering temperatures;    Small grain size;    Two-step sintering;    Two-step sintering process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/146/1/012046/pdf
DOI  :  10.1088/1757-899X/146/1/012046

来源: IOP

【 摘 要 】

Alumina ceramics having small grain size and high density yield good mechanical properties, which are required in most mechanical applications. Two Step Sintering (TSS) is used to develop dense alumina ceramics. In this research work the effect of sintering temperatures on microstructure and density of the alumina specimens developed by using TSS has been investigated. It has been observed that TSS is more efficient in controlling grain growth and increasing the density as compared to One Step Sintering (OSS) of alumina. Scanning electron micrographs of sintered alumina specimens have been compared. It has been observed that TSS proves to be a better technique for increasing density and controlling grain growth of alumina ceramics than OSS. More relative density, hardness, fracture toughness and small grain size was achieved by using TSS over OSS technique.