scholarly journals Setting the functional properties of TiNi alloys during ion-plasma coating deposition process

2021 ◽  
Vol 65 (1) ◽  
pp. 119-128
Author(s):  
V. V. Rubanik ◽  
D. A. Bahrets ◽  
V. V. Rubanik jr. ◽  
V. I. Urban ◽  
A. N. Uzhekina ◽  
...  
Keyword(s):  
Substrate Temperature ◽  
Functional Properties ◽  
Emission Spectrometry ◽  
Tini Alloy ◽  
Nickel Concentration ◽  
Technological Parameters ◽  
Characteristic Temperatures ◽  
Ion Plasma ◽  
Ni Alloy ◽  
One Year

The aim of the present work is to study the influence of the technological parameters of the ion-plasma treatment (IPT) on the functional properties of a TiNi shape memory alloy and its biocompatibility. The object of the study was the Ti–50.8 at. % Ni alloy, widely applied in medical devices. IPT was carried out by vacuum-arc evaporation of a titanium cathode at different values of the bias potential (0, –100, and –500 V), followed by TiN deposition. The functional properties of the TiNi alloy after IPT were investigated using differential scanning calorimetry. The biocompatible properties were evaluated using atomic emission spectrometry to measure a nickel concentration after one year holding TiN-coated TiNi samples in the 0.9 % NaCl solution. It has been determined that by setting the temperature regime of heating of Ti–50.8 at. % Ni alloy samples due to the technological parameters of the IPT process, it is possible to change the interval of realization of thermoelastic martensitic transformations, and, consequently, the temperature response of devices made of this alloy, i. e. to set the necessary functional properties. The comparative analysis of the characteristic temperatures after heat and ion-plasma treatments allow us to conclude that the proposed method for calculation of the TiNi substrate temperature is correct at IPT. The calculated temperature of the TiNi samples was ~275 °C at the zero potential, which is sufficient to shift the characteristic temperatures of the alloy. The substrate temperature during deposition was ~400 °C at a – 100 V bias and above 600 °C at a – 500 V bias, respectively. The Ni concentration in the model solution did not exceed 0.14 mg/l after one year holding, which indicates the high biocompatibility of the TiN-coated TiNi samples.

scholarly journals Functional properties of bimetal composite of “stainless steel–TiNi alloy” produced by explosion welding

2010 ◽  
Vol 10 ◽  
pp. 52-57 ◽  
Author(s):  
S. Belyaev ◽  
V. Rubanik ◽  
N. Resnina ◽  
V. Rubanik (jr) ◽  
O. Rubanik ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Functional Properties ◽  
Explosion Welding ◽  
Tini Alloy ◽  
Bimetal Composite

Urinary nickel: measurement of exposure by inductively coupled plasma argon emission spectrometry

2004 ◽  
Vol 20 (6-10) ◽  
pp. 103-108 ◽  
Author(s):  
Chisato Koizumi ◽  
Kan Usuda ◽  
Satsuki Hayashi ◽  
Tomotaro Dote ◽  
Koichi Kono
Keyword(s):  
Oral Administration ◽  
Atomic Absorption ◽  
Inductively Coupled Plasma ◽  
Measuring Method ◽  
Urine Samples ◽  
Emission Spectrometry ◽  
Nickel Concentration ◽  
Dependent Manner ◽  
Inductively Coupled ◽  
Single Oral Administration

Nickel is a rare earth metal and is widely used in modern industry. Its overexposure in human beings can provoke significant effects including lung, cardiovascular and kidney diseases. As an index of occupational exposure, urine is widely used for the monitoring of nickel concentration because it is a minimally invasive method. Recent studies have used atomic absorption spectrometry to measure nickel concentration. In this study, we introduced novel inductively coupled plasma argon emission spectrometry (ICPAES) which enables us to measure multiple elements simultaneously with smaller volume and with lower detection limits compared to conventional atomic absorption emission spectrometry, and we established the new measuring method by determining the appropriate wavelengths for nickel concentration. Furthermore, using the established new measuring method, we investigated the correlation between a single oral administration of nickel and urine elimination in rats. As a result, different concentrations of nickel standard solutions were measured by ICPAES, and among five specific wavelengths of nickel, 221.647 and 231.604 nm were chosen because they had the highest inclines of both signal to background ratio and emission intensity in simple linear regression analysis. Next, by using healthy human urine samples that had not been exposed to nickel, 231.604 nm was determined to be the most appropriate wavelength because it did not present abnormal intensity due to obstacle wavelength. Male Wistar rats received an oral administration of nickel ranging from 0.025 to 250 mg/kg, which is equivalent to 0.0015-15% of LD50, and during the following 24 h, urine samples were collected and the nickel concentration was measured by ICPAES. With a single oral administration of nickel, there was an increase in urine nickel concentration in a dose-dependent manner and the appropriate equation was developed. Acute renal failure was not observed in this dosage of oral nickel administration by analysing NAG, b2-microglobulin, urine albumin and urine protein. It was concluded that the obtained nickel reference values using ICPAES would be useful for the early diagnosis of nickel intoxication and in the assessment of the exposure to nickel.

Preparation of V-based Alloy Membranes using Chemical Transport Process

2002 ◽  
Vol 752 ◽  
Author(s):  
Tetsuya Ozaki ◽  
Yi Zhang ◽  
Masao Komaki ◽  
Chikashi Nishimura
Keyword(s):  
Substrate Temperature ◽  
Chemical Transport ◽  
Fused Silica ◽  
Hydrogen Purification ◽  
Silica Tube ◽  
Source Temperature ◽  
Ni Substrate ◽  
Ni Alloys ◽  
Ni Alloy ◽  
And Diffusion

ABSTRACTNovel preparation process of V-Ni alloys for hydrogen purification membrane using chemical transport was investigated. Vanadium, NH4Cl, and PtCl2 as evaporating source were put in one side of a fused-silica tube, and Ni substrate was put in the other side. The fused-silica tube was sealed in vacuo, and set in a furnace with temperature gradients. Evaporating source temperature was 1173–1273 K. Substrate temperature was 3–100 K higher than the evaporating source temperature. This process consists of formation of HCl from NH4Cl and PtCl2, chemical transport of vanadium under temperature gradient via chlorides in the presence of HCl, and diffusion of the transported V into the Ni substrate. EDX line profile of cross section of the substrates after the process demonstrated that V diffused into the Ni substrates. Distribution of V concentration in the substrates was dependent on the substrate temperature and the temperature difference between the substrate and the evaporating source. Heating condition was optimized to obtain homogeneous V-Ni alloy. When the substrate temperature and evaporating-source temperature were 1228 K and 1223 K, respectively, V diffused homogeneously into the Ni substrate with thickness of 20 μm, and V concentration attained in the substrate was higher than 70at%.

On Functional Behavior of Strain-Aged Ti-Ni Alloy

2008 ◽  
Vol 59 ◽  
pp. 162-167 ◽  
Author(s):  
Elena P. Ryklina ◽  
Sergey Prokoshkin ◽  
A.A. Chernavina ◽  
Natasha N. Perevoshchikova
Keyword(s):  
Shape Memory ◽  
Thermomechanical Treatment ◽  
Functional Properties ◽  
Shape Recovery ◽  
Critical Temperatures ◽  
Functional Behavior ◽  
Bending Mode ◽  
Ni Alloy ◽  
External Training ◽  
Loading Modes

The functional properties of the Shape Memory Alloys (SMA): critical temperatures, recovery strain, shape recovery rate, two-way shape memory effect (TWSME) value, residual strain etc are determined by an alloy structure which is effectively regulated by thermomechanical treatment. External training parameters strongly affect the final properties as well. The main of them are as follows: strain and loading modes, loading temperature regime (phase state under deformation), load value, loading time, number of training cycles. Actual technical and medical SME articles are functioning on bending mode in most cases. Nevertheless, the influence of external training parameters under bending on properties was not systematically studied. The present work relates to study the combined influence of structure realized under various Low- Temperature Thermomechanical Treatment (LTMT) regimes, including isothermal annealing (strain aging), and external training parameters under bending on functional properties of Ti- 50.7at.%Ni alloy. Variation of training parameters enables additional regulation of final functional properties. The obtained results can be used for development elements functioning in conditions of TWSME realization.

High Temperature Oxidation Behavior of TiNi Alloys

2005 ◽  
Vol 475-479 ◽  
pp. 853-856 ◽  
Author(s):  
J.H. Ko ◽  
Dong Bok Lee
Keyword(s):  
Oxidation Behavior ◽  
Oxidation Mechanism ◽  
Tini Alloy ◽  
Oxide Scales ◽  
Temperature Oxidation ◽  
Outward Diffusion ◽  
Ni Alloy ◽  
Embedded Particles ◽  
High Temperature Oxidation Behavior ◽  
Better Than

The oxidation behavior of the equiatomic TiNi alloy was investigated at 600-900oC. The oxidation resistance of the TiNi alloy was better than the pure Ti alloy, but worse than the pure Ni alloy. The oxide scales consisted of TiO2, with and without embedded particles of TiNiO3 and Ni. The subscale matrix phase was (TiNi3+TiNi) at 600oC, TiNi3 at 700oC, (Ni+TiNi3) at 800oC, and Ni at 900oC. Oxidation was mainly governed by the inward diffusion of oxygen, and the outward diffusion of Ti and a bit of Ni. Detailed microstructures and the oxidation mechanism are proposed.

scholarly journals Дослідження та обґрунтування раціональних парметрів плівкоукладача

2018 ◽  
pp. 161-167
Author(s):  
Є. Я. Прасолов ◽  
С. А. Бєловол ◽  
Б. С. Черненко ◽  
А. В. Ужищенко
Keyword(s):  
Soil Surface ◽  
Influential Factors ◽  
Original Position ◽  
Vegetable Crops ◽  
Technological Parameters ◽  
Optimum Pressure ◽  
Normative Documents ◽  
Starting Position ◽  
Optimization Parameters ◽  
One Year

Наведено результати дослідження згідно методики нормативних документів. Визначено технологічні параметри плівкоукладача. Для зменшення трудомісткості і тривалості досліджень було використано матричне планування. Встановлено залежності параметрів оптимізації від впливових факторів: діаметра та кута нахилу ґрунтового покриття диска з кваліфікованою швидкістю; діаметру та глибини занурення ґрунтово-покривного диска та швидкості руху по висоті. Визначено вплив покриття поверхні ґрунту на динаміку випаровування вологи в залежності від часу спостережень. Встановлено вплив ширини плівки на термічний режим ґрунту. Результати досліджень опробовані в ПП Агрофірма «Анастасія» та ТОВ АФ «ім. Довженка» ВП АФ «Орданівка». Використання плівкоукладача має сезонний характер і окупиться за один рік. The article presents the results of the study in accordance with the methodology of normative documents. The technological parameters of the plumbing machinery for growing vegetable crops are determined. At the beginning of the strip, the plumbing machinery is outputted to its original position and clinging to the traction of the tractor. The front of the plumbing roller is equipped with a tooth compactor, which is connected to the rolling pin, and the width of the frame is set: a roll with a plumbing roll and conveyor rollers and a universal knife that rotates around the axis with a clip position for cutting the plumbing with the flow control sensor of the plumbing. It includes a device for determining the direction and velocity of the compiler; sensor for determining the depth and width of the strip-dip under pinion wheels; a plant recognition sensor and a computer for processing data and making corrections to the work of the compiler, creates the optimum pressure on the paddle wheels adjusting the loader. The edges of the plumbing from the roll are fascinated by universal clamps and they are sent to the rolling wheels. The direction of motion and the speed of the compiler are controlled by the device and the data is transmitted to the computer to adjust the corrections. During the compiler's motion, the front roller makes the leveling strips at the width in front of the rolling wheels. Wheels moving during loading of the compiler under the certain optimum values ​​of the loader press the edges of the plumbing from the roll to the surface of the soil, and the rear trap clogs the film. Releases the clips of the film and return to the original position, and the plumbing at the expense of the natural tension passes through the guide rollers and unfolds along the surface of the soil. At the end of the strip, the plumbing is automatically trimmed, the plumbing machinery is raised by the lift, the tractor turns and goes to the starting position of the new strip and the process continues. Matrix planning was used to reduce the complexity and duration of the research. The dependencies of optimization parameters on influential factors are established: the diameter and angle of the soil surface of the disk with the qualified speed; diameter and depth of submersion of the soil-covering wheel and speed of movement in height. The influence of the surface of the soil on the dynamics of moisture evaporation, depending on the time of observation, is determined. The influence of the width of the plumbing on the thermal regime of the soil is established. The results of the research were tested in the PP agricultural firm «Anastasia» and LLC AF «named after Dovzhenko» VF AF «Ordanivka». The use of the plumbing is seasonal and will pay off in one year.

scholarly journals Influence of magnetron sputtering modes on the parameters of ZnO:Ga films

2021 ◽  
Vol 2086 (1) ◽  
pp. 012009
Author(s):  
A A Geldash ◽  
E Yu Gusev ◽  
V N Dzhuplin ◽  
O A Ageev
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Magnetron Sputtering ◽  
Substrate Temperature ◽  
Film Surface ◽  
Charge Carriers ◽  
Technological Parameters ◽  
Dc Power ◽  
Mobility Of Charge Carriers ◽  
Photoelectric Converters

Abstract The aim of this work is to study the effect of magnetron sputtering modes - its technological parameters (pressure, substrate temperature and DC power source) on the morphology and electrophysical parameters of nanocrystalline ZnO:Ga films, which can be used as contact layers to nanostructures of photovoltaic converters. It was found that with an increase in the substrate temperature, the grain size decreases from 80 to 30 nm and the film surface roughness, as well as the resistivity from 1.68⋅10−1 to 1.2⋅10−2 Ω⋅cm and the mobility of charge carriers with 18.12 to 5.59 cm2/(V⋅s). In this case, the concentration of charge carriers increases from 5.59⋅1018 to 3.31 ⋅ 1020 cm−3. With an increase in the power of the DC source, the grain size increases from 35 to 90 nm and the surface roughness of the ZnO:Ga films, as well as the concentration of charge carriers from 5.91⋅1018 to 3.35⋅1020 cm−3. In this case, the resistivity decreases from 1.42⋅10−2 to 1.3⋅10−2 Ω⋅cm, and the mobility of charge carriers from 6.74 to 3.22 cm2/(V⋅s). The results obtained can be used in the development of technological processes for the manufacture of highly efficient photoelectric converters.

scholarly journals Functional properties of TiNi conical working elements in the holding and release device

2018 ◽  
pp. 216-219
Author(s):  
Eugene S. Ostropiko ◽  
Alexander I. Razov
Keyword(s):  
Shape Memory Alloy ◽  
Functional Properties ◽  
Graphical Method ◽  
Martensitic Transformations ◽  
The Other ◽  
Space Application ◽  
Constraint Forces ◽  
Characteristic Temperatures ◽  
Release Device ◽  
Temperatures Of Martensitic Transformations

Functional properties of conical working elements of the holding and release device for space application needed to control the device were investigated. The elements had 45 mm in diameter, 11 mm in height and 2 mm in thickness, and were made of TiNi shape memory alloy with characteristic temperatures of martensitic transformations Mf = 30^oC; Ms = 45^oC; As =55^oC; Af = 75^oC. Constraint forces and displacement recovery of the conical working elements as functions of the temperature were obtained. It was found that the friction loss for two conical elements put one in the other one reach 15%. A simple graphical method to evaluate the displacement recovery and constraint forces of such conical working elements needed to control the device is proposed.

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