Materials Literature
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Damage behaviors of a thermal barrier coated (TBCed) Ni-base superalloy IN738LC were studied under high temperature low-cycle fatigue (LCF) condition. In this work, the HVOF process was selected as the spray process for bond coat. The CoNiCrAlY alloy was coated by 100 μm in thickness as the bond-coat on the Ni-base su…
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The specific local alignment of the magnetization of a reference layer in spin valves has a rapidly growing significance in the implementation of monolithically integrated sensor devices. The spatial sensitivity of such sensors is defined by the exchange bias effect arising in strongly coupled ferromagnetic (FM) and a…
Stability of 12CaO·7Al2O3 (C12A7) crystal under high-pressure conditions is investigated by sample recovery experiments and first-principles calculations. After high-pressure and high-temperature treatments, C12A7 crystal is mainly decomposed to 2CaO·Al2O3 (C2A) and 4CaO·3Al2O3 (C4A3). According to first-principles ca…
Using first principles calculations combined with the quasiharmonic approach, we study the effects of temperature on the elastic constants, generalized stacking fault energies, and generalized planar fault energies of Ni3 Al. The antiphase boundary energies, complex stacking fault energies, superlattice intrinsic stac…
Traditionally, moisture damage of asphalt concrete (AC) is evaluated by comparing the macroscale strength and stiffness values of a set of moisture- or vapor-conditioned samples with those of a set of unconditioned AC samples. The moisture damage of a bulk (liquid) asphalt binder is determined by the surface energy co…
Plasma gasification is a technology which can process landfill waste to extract commodity recyclables and convert carbon-based materials into fuels. Utilizing this technology to convert municipal solid waste (MSW) to energy has great potential to operate more efficiently than other pyrolysis and combustion systems due…
Monodisperse hollow silica nanospheres (HSNSs) with an outer diameter of ~300 nm and shell thickness of ~50 nm were prepared via a spontaneous dissolution−regrowth process of solid silica nanospheres (SSNSs) in NaBH4 aqueous solution. Experimental results indicated that the as-prepared HSNSs have a reduced thermal con…
The interfacial layer in a Schottky barrier solar cell (SBSC) plays an important role in reducing the dark current, blocking the majority carriers injected into the frontal electrode at forward bias, reducing surface recombination velocity and passivating silicon surface. All these effects reflect into an improvement…
Capacity and voltage retentions upon subsequent cycles for Li2RuO3 and Li2Mn0.4Ru0.6O3 (LMR) under various cut-off voltages have been investigated. The change in average and local structures upon electrochemical cycling were examined by ex-situ XRD and Ru L3-edge XANES measurements, and the relationship between the cy…
Jute is one of the important cash crops of in the South East Asian countries like India, Bangladesh etc. The extraction of mature jute fibre by natural microbial process known as retting. The microbes involves in retting process consume the non-fibrous cementing materials like pectin and hemicellulose. Both over and u…
Accurate modelling of mechanical dynamic behavior is a prerequisite for an effective analysis of both manufacturing processes and dynamic load during service life of the components. Consequently, precise and reliable rate dependent constitutive models, and related parameters, are required to represent the plasticbehav…
The reflectivity measurement of materials is an innovative application of a reverberation chamber (RC). In this paper we show an analysis of the performance of the reflectivity measurement in an RC in terms of uncertainty of measurement and relevant noise level. The model for reflectivity measurement, which is already…
This paper presents a probabilistic framework for vulnerability analysis of electric transmission towers subjected to unbalanced ice loads using the concepts of statistical learning theory (SLT). Based on SLT, the implicit limit state function of each element is replaced by an approximate polynomial function that has…
Platinum nano particles dispersed tungsten trioxide (Pt/WO3) is a promising hydrogen gas sensor material which can detect it by the change of color. Hydrogen gas sensing properties of Pt/WO3 thin film strongly depend on its film structure. Particularly, the porosity and the particle size of WO3 are very important for…
To explore whether pressure and temperature can affect thermal contact resistance, we have proposed a new experimental approach for measurement of the thermal contact resistance. Taking the thermal contact resistance between phenolic resin and carbon-carbon composites, cuprum, and aluminum as the examples, the influen…
This study presents a numerical approach for the calculation of fatality risk caused by the impact of flying debris on the human body. Following an explosion, the formation of a large number of high velocity flying fragments, especially from glass panes, is very possible. The velocity, the mass and the shape of these…
采用机械振动辅助激光熔覆复合改性新工艺,在45钢表面制备了单道Fe-Cr-Si-B-C合金涂层。借助X射线衍射（XRD）、扫描电镜（SEM）和能量分散谱（EDS）分析了熔覆层的物相组成、微观结构和元素分布,通过HVS-1000型显微硬度计测试了熔覆层的显微硬度。结果表明,熔覆层主要由α-（Fe,Cr）固溶体、M7C3（M=Fe、Cr）碳化物、Fe2B硼化物和少量Fe0.9Si0.1组成。在机械振动辅助作用下,熔覆层结合界面组织由平面晶向带状和柱状晶转变,振幅为0.13-0.18mm时的晶粒细化效果最为明显;熔覆层中增强相形态随着频率的增加由短杆状向颗粒状、层状、条状转变,分布形态由杂乱分布向弥散分布和网状分布转变。相比未加机械振动…
Temperature measurement on the nanoscale is important for applications such as detecting the local temperature changes associated with microelectronics, optics, microfluidics, chemical reaction and biochemical processes, such as living cells and nanomedicine. The drive for information at this scale comes from the elec…
Following the recent improvement of the heat treatment pattern for the ITER CS conductor from 250 hour at 650 °C to 250 hour at 570 °C and then 100 hour at 650 °C, the mechanical properties at 4K and the material structure of the conductor jacketmade of JK2LB after heat treatment including the 570 °C phasewere studied…