Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
This master’s thesis explores how to minimize the long-lived actinide waste that is produced in nuclear power plants by performing simulations of thoriated nuclear fuels in existing reactor designs.\nAn European pressurized water reactor (EPR) assembly fueled with a mixture of thorium and highly enriched uranium (20%…
Glycolysis has been generally accepted to be the source of reducing power used for the synthesis of polyhydroxyalkanoates (PHAs) in the anaerobic metabolism of polyphosphate accumulating organisms (PAOs). However, the tricarboxylic acid cycle (TCA) has also been suggested to contribute to the generation of reducing eq…
УДК 669.04 ТЕПЛОТЕХНИЧЕСКОЕ И ЭКОНОМИЧЕСКОЕ ОБОСНОВАНИЕ ВЫБОРА ОПТИМАЛЬНОЙ ТЕМПЕРАТУРЫ НАГРЕВА ВОЗДУХА В РЕКУПЕРАТОРАХ НАГРЕВАТЕЛЬНЫХ ПРОХОДНЫХ ПЕЧЕЙ МАШИНОСТРОИТЕЛЬНЫХ ПРЕДПРИЯТИЙ Доктора техн.наук, профессора ТИМОШПОЛЬСКИЙ В. И., ТРУСОВА И. А., асп.МЕНДЕЛЕВ Д. В., канд.физ.-мат.наук ГЕРМАН М
The square flat plates, are in general elements in the structures of civil and industrial constructions, their actual shape and support mode being imposed by different conditions in the exploitation of the buildings, such as the lay-out of some technological appliances, pipe crossing, embrasures in the stairs and so o…
TiC-Ti3SiC2 composites having the microstructure of fine Ti3SiC2 grains dispersed in TiC matrix were synthesized by two processes, that is, mechanical alloying of a powder blend of Ti, Si and C followed by hot-pressing (MA-HP process) and hot-pressing of a powder blend of Ti, Si and TiC (MIX-HP process). The microstru…
Several homogenized models are compared for accurate representation of ac magnetic properties of silicon steel sheets. Two of them are generalized Pry and Bean models that have a parameter for the frequency dependence of eddy-current loss. The third model assumes a quadratic distribution of magnetic flux density along…
In High-Cycle Fatigue (HCF) of materials like copper, the most common failure modes originate from cyclic strain localization in persistent slip bands (PSBs). The latter form only when the loading amplitudes exceed the PSB thresholds. In contrast to this well-known HCF behaviour, it is shown in the present study that…
Fracture mechanics based techniques can be used to study the phenomena of stress corrosion cracking and hydrogen embrittlement and to model the degradation of metallic materials caused by the uptake of atomic hydrogen. Constant extension rate tensile experiments were performed on both smooth and pre-cracked specimens…
The 7XXX series Al – Zn alloys are precipitation hardenable and therefore amenable for thermomechanical treatment. Al alloys with trace elements are used in aerospace industries inspite of the drawbacks of susceptibility to stress corrosion, poor wettability, poor weldability and poor fatigue resistance. The wettabili…
The stability and interfacial bonding of coincidence tilt and twist grain boundaries (GBs) in Al and Cu have been examined by using the projector-augmented wave method within the density-functional theory. For the {221} Σ=9 tilt GB, glide models are more stable than mirror models for Al and Cu, and the {001} Σ=5 twist…
Sticky point temperature (Ts) measurement for hygroscopic food and biomaterial powders is traditionally performed with complex glass instruments. This property is used to characterize material stickiness, which substantially affects the flow and physical behavior of powders. In this research study we developed a new m…
Core melt solidification phenomena during external reactor vessel cooling is investigated in LIVE tests with different external cooling conditions and melt pouring positions. A non-eutectic simulant melt (80-20 mole% KNO3-NaNO3) is used in the LIVE tests. It is found out that when the vessel is cooled with water at th…
The investigation of reactor pressure vessel (RPV) materials from decommissioned NPPs offers the unique opportunity to scrutinize the irradiation behaviour under real conditions. Material samples taken from the RPV wall enable a comprehensive material characterisation. The paper describes the investigation of trepans…
Soft X-ray spectroscopy was applied to study a calcium bentonite from the Kutch area in India. We recorded the X-ray absorption spectra from the L-edge of calcium, silicon, and aluminum, and from K-edge of oxygen. The Ca absorption spectrum shows a quasi-atomic behavior, while the Si spectrum closely simulates the abs…
Bone is a very active and dynamic tissue that is constantly remodelled in response to mechanical stress and hormonal stimuli. The cells of the bone are capable of restoring bone defects and fractures in their original state. However, in certain circumstances, the spontaneous repair process is hampered, resulting in no…
Different grades of CaCO 3 used for testing the growth of volariella volvacea. The result indicated that French chalk should not be used for spawn production. Pharmaceuticals grade is recommended for spawn production because its cost is 3times lesser that that of lab reagent grade CaCO 3
Current technology of thermal barrier coating systems used in gas turbine blade applications relies upon the use of a metallic bond coat, which has a two-fold function: i) it develops a thin layer of aluminum oxide enhancing the adhesion of the ceramic top coat, and ii) it provides an additional resistance to oxidatio…
Experimental structures of two dimethoxymethane/oxygen/argon flames at equivalence ratios of = 0.24 and 1.72 have been studied by mass spectrometry. The detected species throughout the flame thickness were H2, CH3, CH4, H2O, C2H2, CO, CH2O, CH3O, O2, Ar, CO2, C2H4O2, and C3H8O2. The aim of this work was to extend an o…
p型とn型の熱電素子を直接接合した構造の温度変化センサ(熱電温度変化センサ)を提案し，試作した．試作したセンサの熱電素子には，高いゼーベック効果がある放電プラズマ焼結法で作製したβ-FeSi2系熱電半導体を用いた．この熱電温度変化センサの特性を評価するため，センサを室温から温度差のある恒温水槽へ投入したときのセンサからの起電力を測定し，温度差と起電力との相関関係から温度変化センサとして機能することを確認した．このとき，約30Kの温度差に対して，約5mVの最大起電力が得られた．さらに，熱電温度変化センサの特性を数値解析によって，熱電素子の長さや直径などの形状の依存性とゼーベック係数や熱伝導率，密度，比熱などの物性値の依存性を明らかに…
Surface structures of rutile TiO2(114) have been studied by a combination of scanning tunneling microscopy (STM) and density functional calculations. Depending on the surface preparations, the surface exhibited various complicated structures. Microfaceting structural models can explain the experimental results very we…