Effect of internal binder on microstructure in compacts made from granules |
| |
| Affiliation: | 1. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China;2. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, Jiangsu Normal University, Xuzhou 221116, China;3. College of Materials Science and Engineering, Nanjing Technological University, Nanjing 210009, China;1. Department of Materials, Loughborough University, Loughborough, Leicestershire LE11 3TU, United Kingdom;2. Chemical Engineering Department, Loughborough University, Loughborough, Leicestershire LE11 3TU, United Kingdom;1. The Department of Electrical and Electronic engineering, Southern University of Science and Technology, Shenzhen 518055, China;2. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China;3. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;4. The Department of Electronics and Electrical Engineering, Southeast University, Nanjing 210096, China;5. College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China;1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Biomass Energy and Environmental Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, PR China;1. International Advanced Research Centre for Powder Metallurgy and New Materials, Balapur Post, Hyderabad-500005, Telangana, India;2. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India |
| |
| Abstract: | This paper focuses on the influence of granule characteristics on the microstructure of the compact. Alumina granules were prepared with a poly-acryl acid (PAA) or a poly-vinyl alcohol (PVA) as binders by a spray-drying method. Observation with a liquid immersion method shows a significant difference in the binder distribution. Very uniform and non-uniform distributions were noted for the PAA and PVA binders, respectively. PVA binder segregated at surface and subsurface of the granules. The compression strength and deformation behavior were examined on a single granule with a micro-compression testing machine. The granule with the PAA binder has a low yield stress. In the forming process, the relative density of the compact body started to increase at low pressure. Homogeneous internal structures were noted in the green compact at all pressures examined. The granule with PVA binder showed higher yield stress. The internal structure of the compact was inhomogeneous, and large interstices were often observed between granules in the green compact also. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
