Materials Literature
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As the design life of new nuclear power plant increases, the austenitic stainless cladding integrity of reactor vessel becomes one of the new concerns. Since 1970’s, there have been some specific recommendations on delta ferrite content of austenitic cladding of reactor vessels and welds. It has been known that the de…
The 10~25 mol% Yb-doped BaZrO3 ceramics having relative densities higher than 98% were obtained by the stoichiometric addition of 4 mol% ZnO as a sintering aid and then sintering at 1300°C for 10 hours. The crystal structure of the 10 mol% Yb-doped BaZrO3 ceramics was monoclinic (space group: Pm), while the crystal st…
With specific modelling, measurement, and analysis procedures it is possible to predict, define and control roughness structures for optimal hydrophobic and hydrophilic coatings on glass. Examples are given for sol-gel-layers with ultrahydrophobic and hydrophilic properties.
Reliability based design optimization (RBDO) of a steel catenary riser (SCR) using metamodel is investigated. The purpose of the optimization is to find the minimum-cost design subjecting to probabilistic constraints. To reduce the computational cost of the traditional double-loop RBDO, a single-loop RBDO approach is…
The disused sealed radioactive sources including orphan sources in Lebanon, along with the growing industry of sealed radioactive sources in medical, industrial and research fields have posed a serious problem for authorities as well as users due to the lack of a national store for disused radioactive sources. Assista…
The evolution of singlet oxygen inside both microwave and RF discharges of pure oxygen has been observed for residence times of 0.1–2 ms, achieving a steady value within 1 ms. The corresponding limiting yields decrease inversely with oxygen pressure in the range 2–8 Torr. A kinetic analysis is presented suggesting a s…
Optically and electrically detected magnetic resonance studies of luminescent π-conjugated thin films and organic light-emitting devices (OLEDs) have provided striking insight into their various excitations. The salient feature in the photoluminescence (PL)-detected magnetic resonance (PLDMR) of luminescent π-conjugat…
The Zr/Ti ratio dependence of refractive index and electrooptic coefficient of epitaxial (Pb,La)(Zr,Ti)O3 (PLZT) films were investigated. PLZT films were fabricated on La-doped SrTiO3 (La-STO) substrates by a chemical solution deposition (CSD) method. Optical properties in TE- and TM-modes were measured individually u…
Hemp mats and weaved fabrics were used as received and after surface treatment as reinforcement for composites. Mercerization and amino silane surface treatments improved fibre/matrix adhesion and, as results, the mechanical properties of the composites were also improved. However, if surface treatment was too severe…
The galvanic replacement reaction has been shown to be a robust method to produce a wide variety of nanostructures with complex shapes and compositions. This reaction is highly tunable, allowing for precise control of the properties of the final material. Gold nanocages, one exciting structure made with the galvanic r…
Nonvolatile memory device with the multi‐layered SiC nano‐particles embedded in SiO2 dielectrics for long‐term data storage was fabricated and its electrical properties were evaluated. The SiC nano‐particles were formed by using radio‐frequency magnetron sputtering in the argon ambient and post thermal annealing proce…
Silicon carbide, due to its unique properties, has many promising applications in optics, electronics and other areas. However, it is difficult to process using mechanical machining or electrical discharge machining due to its electrical insulation, high hardness and brittleness. Laser ablation can potentially provide…
Using first principles methods, we systematically study the crucial steps of CVD growth of CNTs, the binding and the diffusion of the carbon feedstock as well as the nucleation of CNTs. Late transition (Ni, Pd, Pt) and coinage (Cu, Ag, Au) metal catalysts were investigated. For all metals, we considered various diffus…
Type 316FR stainless steel has been developed as a candidate material for fast breeder reactors. To ensure the structural integrity at high temperature of the reactor components including the reactor vessel, long-term data and an analysis method are
Since the fiber reinforced polymeric (FRP) composites are considered in next generation of space transportation systems, reliable thermal expansion properties should be well provided for structural design of composite materials. To obtain accurate mechanical behaviors at a cryogenic temperature, precise strain measure…
Two species of Thai medicinal plants named Hua-Khao-Yen were investigated for their antioxidant and cytotoxic activities against two types of human lung cancer cells (A549 and COR-L23) and human normal lung cells (MRC5). The extract procedures used were similar to those practiced by Thai traditional doctors (water and…
Cu absorption solution was investigated for purifying PH3,CuSO4, CuCl2, Cu(NO3)2and Cu(CH3COO)2supply Cu2+for Cu2+absorption solution in experiments. CuSO4solution showed the highest PH3purification efficiency under the condition of 50°C, 200 mL/min and O22%, the PH3concentration in exit gas streams was 0 ppm before 2…
Raman scattering and angle dispersive x‐ray diffraction studies, carried out on double perovskites Sr2MgWO6 up to ∼40 GPa and ∼28 GPa respectively, show the structurally stability up to the highest pressure. Bulk modulus of ambient phase is determined to be 128±3.9 GPa which is in close agreement with the theoretical…
The micromorphology of leaf epidermis of 13 species and 1 variety in Cynanchum from China were examined by environmental scanning electron microscope (ESEM) .The results showed that there were high diversity in the micromorphology of leaf epidermis of Cynanchum.The shapes of leaf epidermal cells in Cynanchum were usua…
Interference lithography can create large-area, defect-free nanostructures with unique optical properties. In this thesis, interference lithography will be utilized to create photonic crystals for functional devices or coatings. For instance, typical lithographic processing techniques were used to create 1, 2 and 3 di…