tailieunhanh - Properties and Applications of Silicon Carbide Part 8

Tham khảo tài liệu 'properties and applications of silicon carbide part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 202 Properties and Applications of Silicon Carbide the microwave heating rate of the composite. The literature suggests that composite thermal conductivity and thermal shock response may influence food heating during cooking and the lifetime of the parts respectively Basak Priya 2005 Parris Kenkre 1997 McCluskey et al. 1990 W. J. Lee Case 1989 Quantrille 2007 2008 . Quantrille has analyzed the heat transfer into the food during cooking and reported results of various microwave heating tests Quantrille 2007 2008 . The ceramics heat quickly . at C s from 900 W incident on powders blends of wt SiCw in AhOs. Food heating results from three processes 1 dielectric loss in the food itself 2 air convection from the ceramic and 3 thermal conduction across the thermal gradient at the ceramic-food interface. Due to 3 and the fact that food moisture content declines as cooking proceeds it is possible to sear the food with grill marks at the end of cooking. It was found that pizzas and paninis could be grilled toasted and cooked to perfection in 80 and 90 seconds respectively Quantrille 2008 . This method can also reduce the energy cost of cooking compared to conventional methods. . Introduction to Structure-Property Relations of Composites To understand different types of models for SiCw composites it is useful to know the broader context of composite-material modeling Jones 1984 Mallick 2008 Runyan et al 2001a 2001b Taya 2005 . Most models depend in some way on the spatial distribution of the phases. Common distributions are shown in Figure 2. Fig. 3. Common types of composite structures. Here Fiber implies continuous unidirectional fibers. After Runyan et al. 2001a with permission John Wiley Sons . Model complexity can vary a great deal based on the extent of assumptions made in the model development. The simplest models are the mixing rules which are applicable when the second phase has a unidirectional and continuous morphology . layered and fiber .

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