Machinability evaluation of machinable ceramics with fuzzy theory
(1.Key Laboratory of Advanced Ceramics and Machining Technology,
Education Ministry, Tianjin University, Tianjin 300072, China;
2. Nanjing Engineering Institute, PLA University of Science and Technology,
Nanjing 210007, China)
Education Ministry, Tianjin University, Tianjin 300072, China;
2. Nanjing Engineering Institute, PLA University of Science and Technology,
Nanjing 210007, China)
Abstract: The property parameters and machining output parameters were selected for machinability evaluation of machinable ceramics. Based on fuzzy evaluation theory, two-stage fuzzy evaluation approach was applied to consider these parameters. Two-stage fuzzy comprehensive evaluation model was proposed to evaluate machinability of machinable ceramic materials. Ce-ZrO2/CePO4 composites were fabricated and machined for evaluation of machinable ceramics. Material removal rates and specific normal grinding forces were measured. The parameters concerned with machinability were selected as alternative set. Five grades were chosen for the machinability evaluation of machnable ceramics. Machinability grades of machinable ceramics were determined through fuzzy operation. Ductile marks are observed on Ce-ZrO2/CePO4 machined surface. Five prepared Ce-ZrO2/CePO4 composites are classified as three machinability grades according to the fuzzy comprehensive evaluation results. The machinability grades of Ce-ZrO2/CePO4 composites are concerned with CePO4 content.
Key words: Ce-ZrO2/CePO4; ceramics; machinable ceramics; machinability; fuzzy theory