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An overwiew on corrosion behavior of steels in factory 钢在工厂中的腐蚀行为概述
Q4 Physics and Astronomy Pub Date : 2021-06-22 DOI: 10.32523/ejpfm.2021050203
H. Demiroren
In this study, corrosion behaviors of diffuser unit solution by which raw sugar is produced from minced sugar beets in sugar factories on St-37 low alloy steel and AISI 304, 304L, 316 austenitic stainless steel types were examined. Moreover, influence of heat treatment on corrosion resistance was investigated. Corrosion tests were performed using mass loss method. SEM-EDX, X-rays Diffraction, microhardness and surface hardness analyses of samples were carried out. As a result, it was determined that AISI 304L and 316 steels have better corrosive resistance and heat treatment improves corrosion resistance.
本文研究了制糖厂用甜菜末生产原糖的扩散装置溶液对St-37低合金钢和AISI 304、304L、316奥氏体不锈钢的腐蚀行为。此外,还研究了热处理对耐蚀性的影响。腐蚀试验采用质量损失法进行。对样品进行SEM-EDX、x射线衍射、显微硬度和表面硬度分析。结果表明,AISI 304L和316钢具有较好的耐蚀性,热处理可提高耐蚀性。
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引用次数: 0
Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings 爆轰喷射方式对NiCr-Al2O3涂层摩擦学性能的影响
Q4 Physics and Astronomy Pub Date : 2021-03-25 DOI: 10.32523/EJPFM.2021050105
B. Rakhadilov, D. Buitkenov, E. Kabdykenova, Zhuldyz Sagdoldina, L. Zhurerova
The article presents the study results of detonation spraying parameters on the phase composition and tribological properties of NiCr-Al2O3 powder coatings. The spraying was carried out at a ratio of the acetylene-oxygen mixture O2 /C2H2=1.856. The detonation barrel filling volume with an explosive gas mixture varied from 30% to 68%. It is determined that the phase composition of the NiCr-Al2O3 coatings varies depending on the degree of detonation barrel filling. With an increase in the detonation barrel’s filling volume, the intensity of the NiCr diffraction peaks is decreased, and the intensity of the a-Al2O3 reflexes is increased, which indicates an increase in the content of the Al2O3 phase. When low filling volume, there is determined a low coating density and uneven roughness. The tribological test results showed that with an increase in the detonation barrel filling volume, there is a decrease in the wear volume, which confirms the increase in the coatings wear resistance. Determined that the lowest friction coefficient was recorded in the sample obtained at the barrel filling volume 68%. The coatings’ high wear resistance is associated with an increase in the alpha phase volume fraction of a-Al2O3 and coatings density.
本文介绍了爆轰喷涂参数对NiCr-Al2O3粉末涂层相组成和摩擦学性能影响的研究结果。喷淋条件为乙炔-氧混合物O2 /C2H2=1.856。爆炸气体混合物的爆轰筒填充体积在30% ~ 68%之间变化。结果表明,NiCr-Al2O3涂层的相组成随爆轰筒填充程度的不同而变化。随着爆轰筒填充体积的增大,NiCr衍射峰强度减小,a-Al2O3反射强度增大,表明Al2O3相含量增加。当填充量低时,涂层密度低,粗糙度不均匀。摩擦学试验结果表明,随着爆轰管填充量的增加,磨损量减小,证实了涂层耐磨性的提高。确定了所记录的最低摩擦系数为试样在筒体填充体积时的68%。涂层的高耐磨性与α - al2o3的α相体积分数和涂层密度的增加有关。
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引用次数: 0
Influence of pulsed plasma treatment on phase composition and hardness of Cr3C2-NiCr coatings 脉冲等离子体处理对Cr3C2-NiCr镀层相组成和硬度的影响
Q4 Physics and Astronomy Pub Date : 2021-03-25 DOI: 10.32523/EJPFM.2021050106
D. Kakimzhanov, B. Rakhadilov, Y. Tyurin, O. Kolisnichenko, L. Zhurerova, M. Dautbekov
In this study, the research results of the influence of pulsed plasma treatment on phase composition, hardness, and roughness of Cr3C2-NiCr coatings are presented. The Cr3C2-NiCr coating was applied to substrate 12Kh18N10T stainless steel by detonation spraying method. To change the physical and mechanical properties of sprayed coating’s surface layers, subsequent pulse-plasma treatment was used. The pulse-plasma treatment leads to changing the roughness of Cr3C2-NiCr coating. The results of mechanical tests showed that after pulsed plasma treatment, the hardness of Cr3C2-NiCr coating is increased. Based on X-ray diffraction analysis, it was found that the hardness increasing of coating is associated with phase transformations on the surface layer, in particular, the formation of the oxide phase and an increase in the number of carbide particles.
本文介绍了脉冲等离子体处理对Cr3C2-NiCr涂层相组成、硬度和粗糙度的影响的研究结果。采用爆炸喷涂法在12Kh18N10T不锈钢基体上制备了Cr3C2-NiCr涂层。为了改变喷涂涂层表面的物理和机械性能,采用了随后的脉冲等离子体处理。脉冲等离子体处理使Cr3C2-NiCr涂层的粗糙度发生变化。力学试验结果表明,脉冲等离子体处理后,Cr3C2-NiCr涂层的硬度有所提高。基于X射线衍射分析,发现涂层硬度的增加与表面层上的相变有关,特别是氧化物相的形成和碳化物颗粒数量的增加。
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引用次数: 4
Non-destructive analysis of materials by neutron imaging at the TITAN facility 用中子成像在TITAN设备上对材料进行无损分析
Q4 Physics and Astronomy Pub Date : 2021-03-25 DOI: 10.32523/EJPFM.2021050101
K. Nazarov, B. Mukhametuly, S. Kichanov, T. Zholdybayev, A. Shaimerdenov, K. B. Karakozov, D. Dyussambayev, M. Aitkulov, M. Yerdauletov, P. Napolskiy, M. Kenessarin, E. K. Kalymkhan, N. Imamverdiyev, S. Jabarov
Since 2019, the TITAN neutron radiography and tomography facility have been operating at the WWR-K research reactor. The experimental station is intended for a wide range of applications in various fields of science. Since the launch, several interesting works have been carried out to study the internal features of lithium-ion batteries and geophysical materials. The spatial resolution of the detector system was sufficient to visualize the internal elements of the lithium battery and to separate individual grains of the pyrite mineral in the rock sample. This paper presents the technical parameters of the experimental setup and the results of the recent applied research.
自2019年以来,TITAN中子射线照相和断层扫描设备一直在wwrk研究堆上运行。该实验站旨在在各个科学领域广泛应用。自发射以来,已经开展了几项有趣的工作来研究锂离子电池的内部特征和地球物理材料。探测器系统的空间分辨率足以可视化锂电池的内部元素,并分离岩石样品中的黄铁矿矿物的单个颗粒。本文介绍了实验装置的技术参数和最近的应用研究结果。
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引用次数: 5
Mechanisms formation of electron-hole trap centers in LiKSO4 crystall LiKSO4晶体中电子-空穴陷阱中心的形成机制
Q4 Physics and Astronomy Pub Date : 2021-03-25 DOI: 10.32523/EJPFM.2021050103
T. Nurakhmetov, Z. Salikhodzha, A. Zhunusbekov, A. Kainarbay, D. Daurenbekov, T. Alibay, B. Sadykova, K. Zhangylyssov, B. Yussupbekova, D. Tolekov
The mechanisms of creation of electron-hole trapping centers in LiKSO4 have been investigated by the methods of vacuum and thermal activation spectroscopy. It is shown that electron-hole trapping centers are formed during the trapping of electrons by anionic complexes and localization of a hole in the lattice in the form of the radical SO4−. The appearance of phosphorescence at 3.0-3.1 eV, 2.6-2.7 eV and 2.3-2.4 eV confirms the creation of electron-hole trap centers.
用真空和热激活光谱的方法研究了LiKSO4中电子空穴捕获中心的形成机制。结果表明,在阴离子络合物捕获电子和以自由基SO4−形式在晶格中定位空穴的过程中,形成了电子-空穴捕获中心。在3.0-3.1eV、2.6-2.7eV和2.3-2.4eV处磷光的出现证实了电子空穴陷阱中心的产生。
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引用次数: 2
Energy transfer of intrinsic electronic excitation to impurities in the CaSO4 − Mn crystal CaSO4−Mn晶体中杂质的本征电子激发能量转移
Q4 Physics and Astronomy Pub Date : 2021-03-25 DOI: 10.32523/EJPFM.2021050104
T. Nurakhmetov, Z. Salikhodzha, K. Zhangylyssov, A. Zhunusbekov, A. Kainarbay, D. Daurenbekov, Zh. Azmagambetova, B. Sadykova, B. Yussupbekova, T. Alibay, D. Tolekov, N. Tulebayeva
The nature of the impurity emission center and the energy transfer mechanisms from intrinsic electronic excitations to the Mn2+ impurity centers in the CaSO4 − Mn crystal have been investigated. The methods of vacuum ultraviolet, atomic absorption and luminescence spectroscopy are used in a wide temperature range from 5 K to 300 K. The energy transfer of intrinsic electronic excitations to impurity emission centers in CaSO4 − Mn has been detected.
研究了CaSO4 - Mn晶体中杂质发射中心的性质以及从本态电子激发到Mn2+杂质中心的能量传递机制。在5 ~ 300 K的宽温度范围内,采用了真空紫外、原子吸收和发光光谱等方法。研究了CaSO4−Mn中本禀电子激发向杂质发射中心的能量转移。
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引用次数: 1
Measuring the yields and angular distributions of g-quanta from the interaction between 14.1 MeV neutrons and sodium nuclei 测量14.1 MeV中子与钠核相互作用的g量子的产率和角分布
Q4 Physics and Astronomy Pub Date : 2021-03-25 DOI: 10.32523/EJPFM.2021050102
S. Dabylova, Y. Kopatch, N. Fedorov, D. Grozdanov, I. Ruskov, V. Skoy, K. Hramco, T. Tretyakova, S. Sakhiyev, R. B. Marzhokhov, E. Bogolyubov, V. Zverev, Y. Barmakov
A study of the reaction of inelastic scattering of 14.1 MeV neutrons by 23 Na nuclei was carried out at the TANGRA facility using the tagged neutron method. In this work, the energies of visible g-transitions are determined, the yields of g -quanta are obtained, the angular distributions of g -quanta for 23 Na are measured. The results obtained are in good agreement with the data of other published experimental works.
在TANGRA装置上,用标记中子法研究了14.1 MeV中子与23个Na核的非弹性散射反应。本文确定了可见g跃迁的能量,得到了g-量子的产额,测量了23na的g-量子的角分布。所得结果与其他已发表的实验数据吻合较好。
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引用次数: 0
Assessment of radiation exposure in the settlements located in Stepnogorsk area 斯捷普诺戈尔斯克地区居民点辐射暴露评估
Q4 Physics and Astronomy Pub Date : 2021-03-25 DOI: 10.32523/EJPFM.2021050107
D. Ibrayeva, M. Aumalikova, K. Ilbekova, M. Bakhtin, P. Kazymbet, Sh.S. Ibrayeva, K. Zhumadilov
The Stepnogorsk area Northern Kazakhstan has a long history mining activities. Mining activities have lots of environmental and health impacts. The aims of this study were to characterizing the general radiological situation of the area and evaluate radiation exposure by scenarios in settlements. In this study radiological assessment was performed for critical group living in the territory contaminated with radionuclides; working and studying at school located on territory former mining site. The annual dose burden is 2.5 mSv y−1 in Zavodskoy, 1.9 mSv y−1 in Kvartsitka and 3.6 mSv y−1 in Aqsu; and exposure from radon is around 11 mSv y−1 at the ground floor, and for teachers - up to 12 mSv*y−1. At settlements, however, under the hypothesis that all food contaminated with radionuclides and vegetables is cultivated locally in the territories with high background level, exposure from ingestion is 9.1 mSv y−1 in Zavodskoy, 8.3 mSv y−1 in Kvartsitka and 11.5 mSv y−1 in Aqsu. The combined effects of environmental problems have culminated into health problems. There are such possibility of the higher prevalence of cardiovascular, digestive and respiratory systems so it is necessary to evaluate or protect people living in Stepnogorsk area.
哈萨克斯坦北部Stepnogorsk地区有着悠久的采矿活动历史。采矿活动对环境和健康有许多影响。这项研究的目的是描述该地区的一般辐射情况,并根据住区的情况评价辐射照射情况。本研究对生活在受放射性核素污染地区的关键人群进行了放射学评估;在原矿区的学校工作和学习。Zavodskoy的年剂量负担为2.5 mSv y - 1, Kvartsitka的为1.9 mSv y - 1, Aqsu的为3.6 mSv y - 1;一楼的氡暴露量约为11毫西弗* - 1,教师的氡暴露量高达12毫西弗* - 1。然而,在定居点,假设所有受放射性核素污染的食物和蔬菜都是在高本底水平的领土上当地种植的,则在扎沃兹科伊的摄入暴露量为9.1毫西弗,在克瓦茨卡为8.3毫西弗,在阿克苏为11.5毫西弗。环境问题的综合影响最终导致了健康问题。心血管、消化和呼吸系统患病率可能较高,因此有必要对居住在斯捷特诺戈尔斯克地区的人们进行评估或保护。
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引用次数: 3
Changes in the structure and properties of ZrO2 detonation coatings during annealing ZrO2爆轰涂层在退火过程中的结构和性能变化
Q4 Physics and Astronomy Pub Date : 2020-12-25 DOI: 10.29317/ejpfm.2020040405
B. Rakhadilov, D. Kakimzhanov, G. Botabaeva, D. Buitkenov, Nurgamit Kantay, L. Bayatanova
The article studied the effect of annealing on the structure and properties of zirconium dioxide coatings obtained by detonation spraying. Detonation spraying was realized on a computerized detonation spraying complex of the new generation CCDS2000. Determined that coatings made of zirconium dioxide are characterized by high adhesive strength of adherence to the substrate. Thermal annealing of coated samples was performed at temperatures of 900-1200◦ C. It was determined that the microhardness of zirconium dioxide coatings increases by 10-25% depending on the annealing temperature after annealing. The results of nanoindentation showed that the nanohardness of the coatings after annealing at 1000◦ C increases by 50%. It was determined that after annealing at 1000◦ C, the elastic modulus of the coatings increases, which indicates a decrease in plasticity and an increase in the strength of the coatings. X-ray diffraction analysis showed that the phase composition of coatings before and after annealing consists of t-ZrO2. After annealing occurs there is an increase in the degree of t-ZrO2 tetragonality. Electron microscopic analysis showed that an increase in the number and size of micro-continuity in the form of thin layers after annealing. Determined that increase the hardness of zirconium dioxide after annealing at 900-1200◦ C is associated with a higher degree of tetragonality t-ZrO2 phase.
研究了退火对爆震喷涂二氧化锆涂层结构和性能的影响。在新一代CCDS2000计算机化爆震喷涂复合体上实现了爆震喷涂。确定由二氧化锆制成的涂层的特征在于与基材粘附的高粘附强度。涂层样品的热退火在900-1200的温度下进行◦ C.经测定,二氧化锆涂层的显微硬度随退火后的退火温度而增加10-25%。纳米压痕的结果表明,涂层在1000℃退火后的纳米硬度◦ C增加50%。经测定,在1000℃退火后◦ C、 涂层的弹性模量增加,表明涂层的塑性降低,强度增加。X射线衍射分析表明,退火前后涂层的相组成均为t-ZrO2。在退火发生之后,t-ZrO2的四方性程度增加。电子显微镜分析表明,退火后微观连续性的数量和尺寸以薄层的形式增加。测定了在900-1200退火后提高二氧化锆硬度的方法◦ C与较高程度的四方性t-ZrO2相有关。
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引用次数: 0
Investigation of the applicability of post-irradiation annealing to reduce the degree of disorder in AlN ceramic to proton irradiation 辐照后退火降低AlN陶瓷无序度对质子辐照的适用性研究
Q4 Physics and Astronomy Pub Date : 2020-12-25 DOI: 10.29317/ejpfm.2020040403
A. Kozlovskiy
The work presents study results of the applicability of high-temperature heat treatment (500-700°C) of nitride ceramics irradiated with protons with an energy of 1.5 MeV and a dose of 10 16 cm−2 . It was found that heat treatment for 60 minutes at a temperature of 700°C allows us to significantly reduce the density of radiation-induced defects and distortions in ceramics structure due to partial annihilation and relaxation of point defects. Dependences of changes in the strength and mechanical characteristics of ceramics on the temperature of post-irradiation annealing are shown. Based on the data obtained, a conclusion was made about prospects of using post-irradiation annealing to maintain the strength of ceramics subjected to loading during operation.
本文介绍了能量为1.5 MeV、剂量为10 16 cm−2的质子辐照氮化陶瓷的高温热处理(500-700°C)适用性的研究结果。结果表明,在700℃的温度下进行60分钟的热处理,可以显著降低由于点缺陷的部分湮灭和弛豫而导致的陶瓷结构中辐射缺陷和变形的密度。揭示了辐照后退火温度对陶瓷强度和力学特性变化的影响。在此基础上,展望了利用辐照后退火技术保持陶瓷在工作过程中受载荷强度的前景。
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引用次数: 0
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Eurasian Journal of Physics and Functional Materials
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