Materials Literature
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The scanning electron microscope (SEM) is a powerful instrument for acquiring microtexture data and characterizing the local crystallography of materials (Wilkinson and Hirsch, 1997). EBSD is the technique that has become almost universally used to obtain such data, so most of this chapter is devoted to a description…
In this chapter we introduce methods for texture determination that do not t into the earlier sections on x-ray or neutron macrotexture or electron microscope-based microtexture techniques. Although x-ray diffraction is usually associated with macrotexture (Section 4.3), such methods can in principle also be used for…
Bone defects caused by trauma, tumor resection or disease present a significant clinical problem. Failures in 'high risk' fractures and large bone defects have been reported to be as high as 30-50%. The drawbacks associated with current bone grafting procedures have stimulated the search for improved techniques for bo…
Chapter 7 discussed the current techniques to determine local orientations in an SEM. Compared with those methods, in particular EBSD, it turns out that TEM-based techniques can contribute most valuable information in cases where their much higher spatial resolution is a signi cant factor, such as where the diffractio…
A spin-off to the spatial speci city of microtexture measurements is that planar surfaces or facets can be analyzed in some crystallographic detail. These surfaces include grain boundaries, phase boundaries, slip traces, cracks, and external surfaces of the specimen, such as facets or fracture surfaces. Although grain…
For the purpose of selecting an effective oranic coating to prevent aluminium alloy components from corrosion in marine atmosphere,two types of advanced coatings known as the IMR11 nano-concentrates composite coating(nanocomposite coating)and the SEBF-2 modified melten epoxy composite coating(epoxycomposite coating)we…
Four types of PEO electrolytes containing Ca,P and Si have been prepared for fabrication of Si-incorporated PEO film on pure titanium.The PEO process and the microstructure and composition of PEO film obtained in the four electrolytes were investigated respectively.The results showed that the thickness of PEO film for…
Al-Mn alloy coatings were electrodeposited on iron substrate with a low temperature molten salt bath of AlCl3-NaCl-KCl-MnCl2 with DC and dual-pulses electric power souses respectively.Surface morphology,rate of deposition,composition and microstructure of the obtained deposits were examined by SEM,metalloscopy,EDS and…
Failure analysis of turbine blades for a heat-power plant of a petrochemical company was conducted by macroscopic and metallographic observations,chemical composition analysis,as well as SEM examination with EDAX analysis.The results showed that the fracture of turbine blades is caused by corrosion fatigue.The pits on…
Four corrosion inhibition technologies for steels,namely coating,corrosion inhibitor,steel bar inhibitor and weathering steels are introduced based on the current knowledge in corrosion and protection of engineering steels.The status in research and application of these technologies and the problems existing in each t…
Research on atmospheric corrosion of stainless steels is reviewed.The characteristics of stainless steels are discussed in terms of corrosion rate,influencing factors as well as the relevant pitting corrosion mechanism in detail.
This thesis is concerned with the material processing, photophysical and third-order nonlinear optical responses, and applications of a set of conjugated polymers in the telecommunication regions. \n Polyacetylene-based third-order nonlinear optical materials were chosen as candidates for all-optical signal and image…
Ce document synthetise mes travaux de recherches sur la periode 2002-2009. Les axes majeurs de mon activite portent sur le couplage de molecules avec des particules metalliques, supportant des modes plasmons (SPP) : - Microscopie et spectroscopie optiques en champ proche, - Relaxation moleculaire par couplage aux plas…
The development of space and time resolved spectroscopic methods to image space and time dependent heterogeneities in catalyst bodies during preparation is of paramount importance for the development of more efficient and sustainable chemical processes. There are a large number of physicochemical parameters that play…
We investigate the dependence of the optical spectral properties of the exciplex in the polymer blend of Poly (9, 9'-dioctylfluorene-co-benzothiadiazole) (ADS133YE) and poly (9,9'-dioctylfluorene-co-bis-N, N'-(4-butylphenyl)-bis-N,N'- phenyl-l,4 - phenylenediamine) (ADS232GE) on the excitation wavelengths and on the c…
The research described in this Thesis is centered around the utilization of block copolymer (BCP) vesicles formed by the self-organization of amphiphilic block copolymers in solvents as nanocontainers to encapsulate enzymes and substrates, and the investigation of the influence of the container’s dimensions on the cat…
We demonstrate that the changes in the elastic properties of the FeAs systems, as seen in our resonant ultrasound spectroscopy data, can be naturally understood in terms of fluctuations of emerging nematic degrees of freedom. Both the softening of the lattice in the normal, tetragonal phase as well as its hardening in…
Zr-Al co-doped ZnO (AZZO) were prepared by DC magnetron sputtering on glass slide substrates under different sputtering powers. Microstructure, Electrical and optical properties of AZZO thin films were investigated. The AZZO films with an electrical resistivity as low as 1.07x10-3Ωcm and an average optical transmissio…
The key issue for realizing the potential of carbon nanotubes has always been, and still remains, a better control of their growth and in particular the selective control of their chirality related to their electronic properties. This work aims to address the in-situ synthesis and characterization of individual carbon…
The process of nanosphere lithography was developed and applied to LED epistructure. We demonstrated p-i-n nanorod LED arrays with some specific characteristics. Moreover, LEDs encompassed with self-aligned nanorods are fabricated. Light diffraction behaviors are characterized. The results are explained by photonic cr…