Microstructure and materials properties

The problems encountered in preparing porous ceramics are shown in further examples below. Fig. 59(a) shows a zirconium oxide sample which was processed in accordance with preparation procedure I from Table 15. In addition to the pores, the microstructure displays artifacts in the form of cracks at the grain boundaries and pullouts of entire grains. The development of artifacts is influenced by preparation techniques, microstructure, and material properties. In preparation procedure I, the... 

Delplancke-Ogletree, M. R, Monteiro, O. R., and Brown, I. G., Preparation of TiC and TiC/DLC Multilayers by Metal Plasma Immersion Ion Implantation and Deposition Relationship Between Composition, Microstructure and Wear Properties," Materials Research Society Symposia Proceedings, Voi.438,1997,p.639. 

The modern discipline of Materials Science and Engineering can be described as a search for experimental and theoretical relations between a material s processing, its resulting microstructure, and the properties arising from that microstructure. These relations are often complicated, and it is usually difficult to obtain closed-form solutions for them. For that reason, it is often attractive to supplement experimental work in this area with numerical simulations. During the past several years, we have developed a general finite element computer model which is able to capture the essential aspects of a variety of nonisothermal and reactive polymer processing operations. This "flow code" has been Implemented on a number of computer systems of various sizes, and a PC-compatible version is available on request. This paper is intended to outline the fundamentals which underlie this code, and to present some simple but illustrative examples of its use. 

FIG. 44. Plasma parameters as deduced from the lEDs and material properties as a function of power delivered to the SiHa-Ar discharge at an excitation frequency of 50 MHz and a pressure of 0.4 mbar (a) the plasma potential Vp (circles) and dc self bias (triangles), (b) the sheath thickness d, (c) the maximum ion flux r ax. (d) the growth rate r,/. (e) the microstructure parameter R. and (f) the refractive index ni ev- (Compiled from E. A. G. Hamers. Ph.D. Thesis, Universiteit Utrecht, Utrecht, the Netherlands. 1998.)... 

Koep E, Jin C, Haluska M, Das R, Narayan R, Sandhage K et al. Microstructure and electrochemical properties of cathode materials for SOFCs prepared via pulsed laser deposition. J. Power Sources 2006 161 250-255. 

S. Torquato, Random Heterogeneous Materials Microstructure and Macroscopic Properties,... 

In this paper, a few examples of Raney catalysts produced by metastable processes and their catalytic properties are discussed. Then, some examples of multi alloy systems, their microstructures and general properties will be shown. Finally, we will discuss the possibility of forming large particle materials with high specific surface area. 

Travitzky, N.A. Shlayen, A. (1998) Microstructure and Mechanical Properties of Alumina/Cu-O. Material Science and Engineering, A224, 154—160. 

Zhao, Z., Johnson, M., Shen, Z. (2002), Microstructure and mechanical properties of titanium carbonitride whisker reinforced P-sialon composites , Materials Research Bulletin, 37, 1175-1187. 

Polyethylene and polystyrene are two of the most commercially important and ubiquitous polymers, primarily because of their commercial value. Since the early days of polymer research there has been considerable interest to produce copolymers from ethylene (E) and styrene (S) because of both academic and business interests. Depending on the nature and type of polymerization chemistry, a variety of different molecular architectures can be produced. In addition to the different monomer distributions (random, alternating or blocky nature), there are possibilities for chain branching and tacticity in the chain microstructure. These molecular architectures have a profound influence on the melt and solid-state morphology and hence on the processability and material properties of the copolymers. 

Breval, E., Deng, Z., Chiou, S., and Rantano, C.G., Sol-gel prepared Ni-alumina composite materials. Rart I, Microstructure and mechanical properties. J. Mater. ScL, 27, 1464, 1992. 

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