Materials Literature
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Relationships of sizing, body shape, and pattern shape to pants fit were explored for women aged 55 and older. Test pants were designed in two shape options (full/flat seat) in five sizes, produced, and tested on 176 participants in five states. Sizes were developed using ASTM D5586-94 data. Both participants and expe…
We examine a new class of volumetric metamaterials based on two-dimensional (2D) transmission-line layers that exhibit a negative refractive index (NRI). The dispersion characteristics of a single 2D layer are revealed through a periodic analysis, and the effective-medium response of the volumetric layered topology is…
It is well known that yarn produced using the compact spinning technique, which has been introduced as one of the best spinning innovations of this century, has superior yarn structure and quality, especially in terms of hairiness and strength. However, there are different compact spinning systems on the market from d…
In this study, dual type polymer electrochromic devices (ECDs) based on homopolymer and copolymer of hexanedioic acid bis‐(2‐thiophen‐3‐yl‐ethyl ester) with 3,4‐ethylene dioxythiophene (EDOT) were constructed, where PEDOT functioned as the cathodically coloring layer. Spectroelectrochemistry, switching ability, stabil…
Ferroelectrets are thin films of polymer foams, exhibiting piezoelectric properties after electrical charging. Ferroelectret foams usually consist of a cellular polymer structure filled with air. Polymer-air composites are elastically soft due to their high air content as well as due to the size and shape of the polym…
Abstract Eu2+ ion-doped nitride phosphor, Ca2Si5N8:Eu2+, was synthesized by the carbothermal reduction and nitridation (CRN) method and the photoluminescence properties were characterized. It showed a broad absorption band between 250 and 550 nm which was efficiently excited by blue LEDs (400–470 nm) and a strong emis…
In this paper we demonstrate that reverse micelles make possible the homogeneous growth of nuclei to nanocrystals with similar shapes. Furthermore, hydrazine increases the relative percentage of tetrahedral nuclei with selective adsorption during crystal growth, favouring the formation of nanodisks.
The use of shape memory alloys (SMA) as smart structures and other modern applications require a previous evaluation of its performance under load as well as a training procedure. In general, these requirements lead to the design and assembly of a specific test bench. In this work, an experimental set-up was specially…
This paper shows the effect of the nature of some alkaline activators in the microstructural development of thermal-alkali activated f/y ash systems. The alkaline compounds employed in this investigation were: NaOH, KOH, Na2C03, K2C03, sodium silicate and potassium silicate. Results confirm that the main reaction prod…
The magnetic properties of La0.70Sr0.30MnO2.85 anion-deficient manganite are studied experimentally under hydrostatic pressure. The results show that, in the whole pressure range under investigation (0–1 GPa), the sample is a spin glass with a smeared phase transition to the paramagnetic state. It is found that the sp…
In view of the interest in wicking as an alleged comfort feature for active and leisure wear an analysis of the wicking and liquid retention properties of nylon 6.6 continuous and textured filament yarns commonly used for lightweight high performance woven fabrics was carried out taking into consideration the effects…
The short-ranged bonding structure of organosilicate glasses can vary to a great extent and is directly linked to the mechanical properties of the thin film material. The combined action of ultraviolet (UV) radiation and thermal activation is shown to generate a pronounced rearrangement in the bonding structure of thi…
The math modeling of distribution of flux flow field and analysis on pressure of meniscus in mold have been carried out by commercial software Fluent. The flow rate of flux was maximum at time t =0 during a oscillation circle,at that time the minus pressure on solidified shell was produced by flux, therefore it should…
The phase composition, impact energy Akvand hardness HRC value of duplex stainless steel 00Cr25Ni7Mo4N solution treated at 900~1300 ℃ have been studied and examined. The results showed that 16.97%~ 3.22% a- phase precipitated in duplex stainless steel during solution treatment at 900~1020 ℃ led to the impact energy Ag…
The austenite stainless steel YGA201-≤0. 10C,5.0～9.5Mn,16.0～19.0Cr,3.5～5.5Ni,1.0~ 2.0Cu,≤0.2N has been melted and studied by a 200 kg induction furnace in laboratory. The mechanical properties and corrosion test results showed that the elongation of 1050 ℃ solid solution heat treated YGA201 stainless steel containing…
The inclusion, structure and texture of 0.5 mm cold rolled sheet of non-orientation silicon steel-0.003C 1.46Si,0.38Al have been tested and analyzed. The analyzed results showed that difference in anisotropy of iron loss of sample was 7.56%～11.01%.Reasonably increasing finishing rolling temperature of non-orientation…
The nitrogen content in GCr15 bearing steel at each melting phase in 50 t EAF-LF(VD)-CC process was analyzed to obtain that the EAF end [N] was(23~36)×10-⁶ and the N content in products was (79~104)×10-⁶.In order to decrease the N content in bearing steel, with charging ≥35% hot metal in EAF, using low nitrogen carbon…
The effect of 2.5 mm hot rolled plate of electric steel(≤0.005%C-2.5%～2.8%Si)normalizing at 850 ~1100℃ on structure and magnetic properties of 0.5 mm cold rolled sheet annealed at 880 ℃+ 950 ℃ has been studied.The results showed that with increasing normalizing temperature of hot rolled plate,the recrystallized grain…
The effect of metal temperature, initial sulfur content in metal, stirring time, rotational speed and adding amount of desulphurizer on desulphurization results of an 80 t KR hot metal pretreatment unit has been studied. The results showed that with increasing metal temperature the desulphurization effects increased,…
The size, amount and morphology of carbo-nitride precipitated in Nb-V-Ti-B and Nb-V-Ti microalloy steel EH420 rolling at 900~1000℃ with deformation 40%～60% by electron microanalysis and physical-chemistry phase analysis technique. The test results showed that the amount of carbo-nitride precipitated in steel rolling a…