Materials Literature
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Tin bronze (Cu-8%Sn) was cast into cylindrical samples using a unidirectional solidification device monitored by thermocouples. Four cylindrical samples were obtained under four different experimental conditions where pouring temperature, heat extraction and addition of inoculant changed. Thermocouple temperature curv…
The transformation of an andalusite (Al 2 O 3 ·SiO 2 = A) single-crystal to 3:2-mullite (3Al 2 O 3 ·2SiO 2 = M) and non-crystalline silica (SiO 2 ) was investigated at the (100) A and (010) A faces using electron microscopy. The transformation starts topotactically at the surfaces producing a dense layer of mullite an…
Ba 2 Co 2 Fe 28 O 46 nanocrystals were synthesized through a stearic acid sol–gel method. The reaction temperatures were notably lower than that of the conventional ceramic method. The nanocrystalline particles obtained at 750 °C were spherical in shape with grain sizes ranging from 10 to 25 nm. Their morphology becam…
We fabricated bismuth (Bi) nanowires with low energy electron beam lithography using silver (Ag) nanocrystal shadowmasks and a subsequent chlorine reactive ion etching. Submicron-size metal contacts on the single Bi nanowire were successfully prepared by in situ focused ion beam metal deposition for transport measurem…
1,5-dioxepan-2-one (DXO) is presented as a versatile component in biodegradable polymers for biomedical applications. Copolymerization of DXO and L-lactide yielded a semi-crystalline, yet flexible, material where the extent of crystallinity and erosion characteristics were controlled by an appropriate choice of copoly…
The biological colonisation of stainless steel surfaces (AISI 304 resp. 316L) was investigated by monitoring the development of natural biofilms, axenic biofilms with selected laboratory strains, and axenic biofilms with a natural biofilm isolate. Digital image analysis of epifluorescence microscopic photographs for q…
In this paper, finite element analysis (FEA) of a hysteresis motor using a magnetization-dependent model is presented. The hysteresis loop in the hysteresis ring is calculated from the maximum flux density which is obtained by the FEA. The proposed method is applied to a sample motor and the simulation result shows a…
Abstract The coordination compounds of the general formula Ln(HL) 2 (NO 3 ) 3 , (where Ln = La - Eu (without Pm), HL = C 6 H 5 C(O)NHP(O)[N(CH 3 ) 2 ] 2 , N,Nʹ-tetramethyl-Nʺ-benzovlphosphoryl-triamide) have been synthesized and characterized by means of IR, UV-VIS, 1 H, 31 P NMR spectroscopy, and X-ray analysis. The…
Abstract A new grafting method was developed to incorporate maleic anhydride directly onto solid‐state polypropylene powders. Maleic anhydride grafts altered the nonpolar characteristics of polypropylene so that much better mixing was achieved in blends and composites of polypropylene with many other polymers and fill…
This paper deals with the direct inclusion of vector hysteresis and eddy current losses in a 2D finite element (FE) time stepping analysis. It is shown that a vector Preisach model can be inverted in an efficient way by means of the Newton-Raphson method and that it thus can easily be included In the Newton-Raphson it…
Improving the adhesion of polyolefins to glassy polymers is complicated by the semicrystalline nature of the polyolefins. Traditional methods used in glassy polymers to increase the interlayer adhesion, including the addition of a diblock copolymer or the formation of a copolymer through in situ reaction, are still su…
Overproduction of Thermus sp. YS 8-13 manganese catalase in Escherichia coli BL21(DE3) was accomplished by introducing a derivative of pET-23a(+) containing a copy of the coding gene into the multicloning site. E. coli BL21(DE3)/pETMNCAT produced abundant quantities of manganese catalase as insoluble inclusion bodies.…
Silver and Ag‐Pd alloy are cofired with BaTiO 3 ‐based dielectrics during the manufacturing of capacitors. The diffusion of silver into BaTiO 3 during sintering is very slow. However, the vapor pressure of silver is high at temperatures greater than the melting point of silver (960°C). The effect of the evaporation of…
PURPOSE: To compare the effects of gadolinium concentration on intermediate-weighted fast inversion-recovery and T2-weighted fast spin-echo magnetic resonance (MR) images by using a saline bag model of the kidney. MATERIALS AND METHODS: Normal-saline bags containing gadopentetate dimeglumine in concentrations of 0-20…
The standard Gibbs energies of formation of RuO 2 and OsO 2 at high temperature have been determined with high precision, using a novel apparatus that incorporates a buffer electrode between the reference and working electrodes. The buffer electrode absorbs the electrochemical flux of oxygen through the solid electrol…
The impact response of laminated composites consisting of alternate layers of Al alloy foam and Al2O3 was studied experimentally in low and intermediate velocity regimes. Low velocity impacts (1.2–2.8 m s-1) were conducted using an instrumented falling weight apparatus and were compared with static indentation tests (…
The oxidation kinetics of CVD SiC were measured by thermogravimetric analysis (TGA) in a 4H 2 ·12H 2 O·10CO·7CO 2 ·67N 2 gas mixture flowing at 0.44 cm/s at temperatures between 1300° and 1450°C in fused quartz furnace tubes at 1 atm total pressure. The SiC was oxidized to form solid SiO 2 . At ≥1350°C, the SiO 2 was…
Cotton fabric is treated in different concentrations of BTCA and SHP solutions. The fabric weight gain is confirmed by FTIR analysis, and the peak ratio of 1720 cm -1 /1380 cm -1 has a good linear relation with fabric weight gain. The results show that BTCA is most effective for durable press finishing at around 2%. T…
The charge-density-wave (CDW) structure of the monophosphate tungsten bronze ${\mathrm{P}}_{4}{\mathrm{W}}_{20}{\mathrm{O}}_{68},$ the $m=10$ member of the ${(\mathrm{P}\mathrm{O}}_{2}{)}_{4}{(\mathrm{W}\mathrm{O}}_{3}{)}_{2m}$ series has been solved at room temperature from single-crystal x-ray-diffraction data. In a…
Variable temperature x-ray diffraction and differential scanning calorimetry experiments on the superlattice solids of alkanethiol protected silver nanoclusters show that the translational periodicity collapses around 398 K resulting in a liquid phase, which upon cooling, reverts into the parent crystalline phase. Thi…