Materials Literature
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Abstract (TmxYb1 –x)3Al5O12 (YbAG:Tm3+) nanoparticles (NPs) with mean diameter of 56 nm were prepared by a rapid carbonate coprecipitation method with a short calcination time of only 1 min. Our results confirmed the structure and purity of the prepared material and proved that Tm3+ was successfully incorporated into…
Abstract The formation of temperature fields and tempering zones during electric pulse hardening of thin-walled parts is studied. A mechanism is developed to supply a filler wire for semiautomatic vibrational arc facing. The influence of the pulsed arcing parameters on the surface hardness of the part to be hardened i…
Abstract Within this work we model the spatial dependences of protein concentration, nucleation probability and the radius of lysozyme crystal in the experiments on capillary counter-diffusion crystallization. Within the model approach, we evaluate the conditions for the formation of lysozyme crystals with the target…
Austenitic stainless steels play vital role in high temperature applications. The components used in fission reactors should have better tensile properties at high temperature. To overcome the issues raised by conventional steels, a new group of steels known as oxide dispersion strengthened (ODS) steels are created. N…
Pada zaman sekarang pemesinan menggunakan material keras dan bentuk kompleks telah menjadi kebutuhan, oleh karena itu untuk mengatasi masalah tersebut telah dikembangkan pemesinan non konvesional yang salah satunya adalah electrochemical machining (ECM). Pada penelitian terdahulu belum banyak dibahas tentang proses fa…
From the perturbation formulas for g factors for an orthorhombically compressed octahedral 3d9 group, g factors, and local structures for the [Cu(en)3]2+ groups in Cu(en)3SO4 and Cu(en)3Cu(CN)3 powders are theoretically investigated. The local structure of Cu2+ in Cu(en)3Cu(CN)3 is evaluated by analyzing the experimen…
The paper studies the evolution of the imperfect structure of Fe-Ni alloys under plastic deformation and subsequent isochronal annealing by positron annihilation spectroscopy. The stages corresponding to the annealing of vacancy-type defects, the heterogeneous nucleation of Ni 3 Ti precipitate particles and recrystall…
The article presents the results of studying a template with stress corrosion cracking defects. After magnetic particle inspection, a visual analysis of the revealed cracks is carried out in order to fix the traces of mutual influence, which lead to their merging into a common defect with further development. The rese…
ИССЛЕДОВАНИЕ ВЛИЯНИЯ РЕДКОЗЕМЕЛЬНЫХ ЭЛЕМЕНТОВ НА КЕРАМИЧЕСКИЕ МАТЕРИАЛЫ НА ОСНОВЕ ZRB 2 -SIC (20 ОБ
The author’s name should read Yu. H. Budnikova.
In this work, a FEM-based algorithm for calculating the electrothermal coupling process with inhomogeneous conductivity is presented. Firstly, electrothermal coupling problems are analyzed and corresponding coupling equations are presented. Secondly, iterative solution procedures are used to solve the coupling equatio…
As a spacecraft enters a planetary atmosphere, severe attenuation of communication signals can occur due to the formation of a plasma sheath around its airframe. The resulting communications blackout has known negative consequences. Early studies have shown that such plasma can be modeled as a negative permittivity ma…
Le fonctionnement du haut-fourneau est maintenant bien connu et sa technologie bien maîtrisée. Cette technique est maintenant confrontée à de nouveaux défis : sa production élevée de CO 2 , la nécessité de diversifier les sources d’énergie et l’adaptation à la qualité moindre des minerais et des charbons.
Magnetic resonance-guided high intensity focused ultrasound (MR-HIFU) is a relatively new treatment modality in Malaysia. This minimally invasive technique of tissue heating and ablation has been a promising tool for treatment of various pathological diseases, particularly uterine fibroid. An MR-HIFU system (Philips S…
Abstract Controlling the procedure for etching shallow trench insulation (STI) is part of the CMOS production cycle. Optical scatterometry, which allows the simultaneous replacement of several techniques used earlier, can be used to increase the reliability of and information obtained with this control process. The et…
The interest in replacing native wood with fast growing reforestation wood is recurrent, aiming at larger quantities of material in less time with no losses in its resistive properties. This paper consists in comparing the behavior of in natura structural timber parts with glued laminated timber, made with polyurethan…
Most of today’s Body-In-White (BIW) design efforts focus on functionality, light weighting and maintaining safety standards. Tailored hot stamping using the in-die heating technique was introduced to meet these needs. \nThe uniaxial damage behavior of three novel hot stamped tailored material conditions (TMC) was exam…
Actual problems of heat exchangers efficiency are considered. It is assumed that the use of ultrasonic vibrations in heat exchangers will help to increase the of heat exchange efficiency, and to reduce the amount of deposits and spume in tube side. Ultrasonic cleaning, as a method of cleaning the surface from solids i…
Abstract The linear thermal expansion coefficients (LTEC) of semimetallic Fe2MAl (M = Ti, V, Cr, Mn, Fe, Co, and Ni) alloys have been measured in the temperature range 80–900 K. The magnetic-fluctuation contribution to LTEC αm, sf(T) = αm(T) + αsf(T) consisting of negative “Stoner” αm(T) and positive “spin-fluctuation…
The transfer characteristics of zinc tin oxide(ZTO) on silicon dioxide(SiO2) thin film transistor generally depend on the electrical properties of gate insulators. SiO2 thin films are prepared with argon gas flow rates of 25 sccm and 30 sccm. The rate of ionization of SiO2(25 sccm) decreases more than that of SiO2(30…