bluuebunny/crossref_metadata_2025_split huggingface dataset:
Oxidation Behavior of Coating Alloy CoCrMoSi and CoCrMoNiSi in Superheated Steam at 800˚C
Authors: Xiao Bingjie , Huang Xiao , Yao Matthew 
Published: September 2021

Abstract
As steam power plants continue to move towards higher operating temperatures in order to improve efficiency, materials exposed to the working fluid are subjected to accelerated degradations in the forms of surface oxidation and reduced mechanical properties. In this study, the oxidation behavior of two cobalt base alloys, CoCrMoSi (T14) and CoCrNiMoSi (T19), was evaluated in superheated steam (SHS, 0.1MPa) at 800 °C for up to 500 hours. After the exposure, both T14 and T19 alloys experienced weight gain caused by oxidation. Visual observation and SEM surface analysis revealed that T19 had greater extent of surface oxide spallation than that seen on T14. From the cross-sectional evaluation, however, a thin, adherent oxide layer was found to have formed on T19. T14 in fact had suffered from excessive internal oxidation and the surface oxide was uneven. Based on the results obtained so far, it is believed that the finer Laves phase combined with greater amount of Cr in alloy T19 have enabled the formation of a protective oxide layer and thus reduced the extent of internal oxidation. Due to the extensive oxidation ingress along the large Laves phase, it is concluded that T14 is not suitable for applications in SHS at 800 °C.
Influence of Ultrasonic Sealing Treatment with Aluminum Phosphate on Properties of Al2O3-TiO2 Plasma Sprayed Ceramic Coating
Authors: Van Tuan Nguyen , Nguyen Tuan Anh , Thi Phuong Nguyen , Thi Ha Pham , Thi Ly Pham , Quoc Cuong Ly , Bich Thuy Hoang Thi , Vu Duong , Thu Quy Le 
Published: September 2021

Abstract
Thermally sprayed Al2O3-TiO2 ceramic coatings provide exceptional hardness and corrosion and wear resistance, but the high velocities at which they are applied result in an inherently porous structure that requires some type of remediation. This study evaluates the effectiveness of ultrasonic aluminum phosphate sealing treatments on plasma sprayed Al2O3-40TiO2 ceramic coatings. The sealants were applied with and without ultrasonication (20-40 kHz) and were assessed using SEM/EDX analysis, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). Test data indicate that optimum sealing, corresponding to the highest values of corrosion protection and erosion resistance, are achieved under ultrasonication at 30 kHz for 5 hours.
Sealing Treatment of Plasma Sprayed Cr3C2-NiCr/Al2O3-TiO2 Coating by Aluminum Phosphate Sealant Containing Al2O3 Nanoparticles
Authors: Van Tuan Nguyen , Nguyen Tuan Anh , Thi Ha Pham , Thi Ly Pham , Nguyen Phuong , Bich Thuy Hoang Thi , Van Trung Trinh , Vu Duong , Thu Quy Le 
Published: September 2021

Abstract
A typical structure of thermal spray coatings consisted of molten particles, semi-molten particles, oxides, pores and cracks. These factors caused the porosity of sprayed coatings, leading to a great influence on the coating properties, especially their wear-corrosion resistance. In this study, a post-spray sealing treatment of Cr3C2-NiCr/Al2O3-TiO2 plasma sprayed coatings was carried out, then their corrosion properties were evaluated, before and after the treatment. For sealing process, aluminum phosphate (APP) containing aluminum oxide (Al2O3) nanoparticles (~10 nm) was used. The permeability of APP into the sprayed coating was analyzed by scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS). The treatment efficiency for porosity and corrosion resistance of sprayed coatings were evaluated by electrochemical measurements, such as the potentiodynamic polarization and electrochemical impedance spectroscopy. In addition, the wear-corrosion resistance of the sealed coating was examined in 3.5 wt.% NaCl circulation solution containing 0.25 wt.% SiO2 particles. The obtained results showed that APP penetrated deeply through the sprayed coating. The incorporation of Al2O3 nanoparticles into APP sealant enhanced the treatment efficiency of porosity for sprayed coating. The effect of the post-treatment on corrosion protection of the sprayed coating has been discussed.
Plasma-Sprayed (Bi2O3)0.705 (Er2O3)0.245 (WO3)0.05 Electrolyte for Intermediate-Temperature Solid Oxide Fuel Cells (IT-SOFCs)
Authors: Chen Rui , Li Cheng-Xin , Li Chang-Jiu 
Published: September 2021

Abstract
Stabilized bismuth oxide with fluorite structure is considered a promising electrolyte material for intermediate temperature solid-oxide fuel cells (SOFCs) due to its high oxygen ion conductivity. The ternary system, Bi2O3-Er2O3-WO3, is of particular interest because it is ionically conductive as well as thermally stable. This study investigates the quality of Bi2O3-Er2O3-WO3 (EWSB) electrolyte produced by plasma spraying. The phase structure and cross-sectional microstructure of plasma-sprayed EWSB were characterized by XRD and SEM. The as-sprayed EWSB was found to have a dense microstructure with well bonded lamellae. XRD analysis showed the formation of EWSB with δ-phase and a trace of β-phase, while the β-phase disappeared after annealing at 750°C for 10h. Electrical property tests revealed that the plasma-sprayed electrolyte also had excellent ionic conductivity (0.26 S cm-1 at 750 °C), making it a strong candidate for use in SOFCs at intermediate temperatures.
Numerical Reconstruction of Porous Architecture for Suspension Plasma Sprayed Coatings
Authors: Zhao Yongli , Yang Zhimeng , Wen Juhong , Planche Marie-Pierre , Peyraut François , Ilavsky Jan , Lenoir Bertrand , Liao Hanlin , Montavon Ghislain , Lasalle Audrey , Allimant Alain 
Published: September 2021

Abstract
The porous architecture of coatings has a significant influence on the coating performances and thus should be properly designed for the intended applications. For simulating the coating properties, it is necessary to determine the numerical representation of the coating microstructure. In this study, YSZ coatings were manufactured by suspension plasma spray (SPS). Afterwards, the porous architecture of as-prepared coatings was investigated by the combination of three techniques, imaging analysis, Ultra Small Angle X-ray Scattering (USAXS), and X-ray transmission. A microstructural model for reconstructing the porous architecture of the SPS coating was subsequently computed according to the collected experimental results. Finally, the coating thermal properties were simulated based on the model and were compared with the experimental results.
Hybrid Plasma Spraying —Discovering the Effects of Deposition Parameters
Authors: Tesar Tomas , Musalek Radek , Medricky Jan , Cizek Jan , Lukac Frantisek , Chraska Tomas , Dudik Jonas 
Published: September 2021

Abstract
Hybrid plasma spraying is emerging as the next potential technology leap in thermal spraying. The combination of high throughput and deposition rates of coatings sprayed from powders with the tailored functionality of liquid-feedstock sprayed coatings appears highly promising for a wide range of applications. Moreover, possible refined mixtures of different materials come readily with the utilization of multiple feedstocks with varying particle sizes. However, the practical aspects of hybrid coatings production are accompanied with several peculiarities not encountered when using distinct feedstocks. To deepen the understanding of this novel route, this paper presents fundamental hybrid coating formation principles and the effect of selected deposition parameters using multiple case-study material systems, such as Al2O3-YSZ, Al2O3-Cr2O3, and Al2O3-TiO2.
Potential of Suspension Spraying for Development of Dense WC-12Co Coatings
Authors: Toma Filofteia-Laura , Kunze Oliver , Meyer Anja , Potthoff Annegret , Mayer Markus , Pötschke Johannes 
Published: September 2021

Abstract
Thermally sprayed WC-Co coatings provide excellent wear resistance and corrosion protection under heavy loads, but their application usually involves additional grinding and polishing steps, which can be 3-4 times costlier than the spraying process itself. There is thus the motivation to develop a process that produces smooth, near-net-shape carbide coatings. This contribution is an investigation of WC-12Co coatings obtained by suspension HVOF spraying. Significant work was devoted to the development and characterization of water-based hardmetal suspensions synthesized from commercially available WC and Co powders. The suspensions produced were sprayed using the HVOF process, and the resulting coatings were evaluated based on microstructure, hardness, and phase composition.
Development of Metal-Ceramic-Lubricant Composite Coatings Obtained by Cold Spray for Tribological Applications in the Automotive Industry
Authors: Garcin G. , Delloro F. , Jeandin M. , Hochepied J-F. , Grente C. , Bidault E. , Boutet S. , Jousset M. , Bonay E. , Rivaud G. , Denoirjean A. , Abry J-C. , Bouvard G. , Malhomme T. , Fridrici V. 
Published: September 2021

Abstract
One of the main levers to reduce CO2 emissions in cars and trucks is mass and friction reduction, which is often achieved through the use of special coatings. The aim of the present work was to develop metal-ceramic-lubricant composite coatings with the best combination of wear, seizure, fatigue, and thermal resistance. Metal-based coatings incorporating hard particles and solid lubricants were cold sprayed onto steel substrates and the relationship between coating microstructure and tribology was studied. To meet the demanding tribological requirements of heavily loaded engines, the interfaces between the different components were optimized by selecting appropriate feedstock powders and assessing a wide range of process parameters. Alumina-reinforced bronze composite coatings were made from powders with different morphologies. Aggregated ceramic powders were found to be more beneficial in terms of wear than massive powders, and graphite was found to be effective for reducing seizure.
Laser Assisted Cold Spray for Improved Adhesion of Soft Materials to Hard Substrates—Case Study for Copper Coatings on Steel
Authors: Legoux Jean-Gabriel , Guerreiro Bruno , Poirier Dominique , Giallonardo Jason D. 
Published: September 2021

Abstract
In cold spray, high adhesion of soft materials on hard substrates is commonly achieved by using helium as the propelling gas. This is the case of copper coatings on steel where adhesion may reach values as high as 60 to 80 MPa (glue failure), however, helium is a limited, expensive natural resource, and the use of more abundant nitrogen gas is preferred in an industrial setting. Unfortunately, when using nitrogen gas, little to no adhesion is obtained. In order to eliminate the use of helium gas we studied how laser assisted cold spray could lead to an improvement in adhesion of nitrogen sprayed copper coatings. In this work, several laser parameters (e.g., power and spot size) and process parameters (traverse speed, relative position laser spot vs. gas jet) were varied at a coupon level. Upon optimization, an equivalent adhesion to the coatings prepared with helium was obtained. Furthermore, the cross section of the coatings showed that the copper particles penetrated the steel, similar to what is observed when using helium gas. Optimization of these parameters for application to large diameter (~559 mm) cylinders was also performed. A discussion on the mechanisms which contribute to achieving high adhesion considering the use of helium versus laser assistance is provided.
Hybrid Metallic Coatings on Polymer-Based Composites
Authors: Fallah Panteha , Yue Stephen , McDonald André 
Published: September 2021

Abstract
A previous study showed that Cu can be cold sprayed onto carbon fiber-reinforced polymers (CFRPs) if a Cu interlayer is deposited prior to low-pressure cold spraying. In this present study, Cu was cold sprayed onto CFRP substrates that were coated with either Sn (cold spray) or Ni electroplating. Two layers of Cu powder were also cold sprayed onto a Cu-plated CFRP substrate to investigate the effect of a second particle layer on impacting particles. Test results showed that the relative hardness between the particle and substrate has a major effect on deformability, impact mode, and deposition efficiency (DE), which explains why Cu could not be cold sprayed onto Sn or Ni interlayers and why the deposition efficiency of Cu-on-Cu substrates is lower than that of one pass spraying. In summary, the results suggest that Cu can be successfully cold sprayed at low pressures onto electroplated Cu due to their similarity in hardness.
Combined Laser Shock and Micro-Compression Approach to the Mechanical Behavior of Powders for Cold Spray
Authors: Durand H. , Lacourt L. , Teissedre J.-C. , Delloro F. , Thorel A. , Lahouij I. , Lavaud F. , Clausse X. 
Published: September 2021

Abstract
In cold spray, particles undergo large plastic deformation upon impact in a rapid dynamic regime (up to 109 s-1) at solid state. The simulation of this impact is key to understanding the cold spray process. In this study, an approach based on laser shock and micro-compression testing was developed to characterize the mechanical behavior of powders and fit parameters of the Johnson-Cook material behavior model. In situ micro-compression particle testing was performed in a SEM equipped with a microindentation stage. From subsequent FEM simulations of the test, static coefficients of the Johnson-Cook model were identified. A laser shock powder launcher (LASHPOL) was also developed to accelerate single particles and measure their corresponding velocity using high-speed imaging. In addition, image analysis of the particles before and after impact, together with FEM simulation, were used to determine strain rate hardening coefficients for the Johnson-Cook model.
Hydrogen Generation Supports Plasma Wire Arc Metal Additive Manufacturing Powder Production
Authors: Wolff David , Berghorn Chris , Cook David , Strauss Joseph 
Published: September 2021

Abstract
Wire atomization processes used to make refractory and high temperature alloy powders are relatively expensive due to the cost of feedstock, energy, and gas. A new process based on Transferred Arc Wire Atomization technology, however, has the potential to overcome these problems. This paper introduces the innovative process which, in combination with hydrogen generation, presents new opportunities for several alloys that can be more easily processed by plasma wire atomization. The new approach shows promise to reduce both fixed and variable costs for certain refractory and high temperature materials.
Development of Advanced TBC for 1650 °C Class Gas Turbine
Authors: Okajima Yoshifumi , Torigoe Taiji , Mega Masahiko , Kuwabara Masamitsu , Okaya Naotoshi 
Published: September 2021

Abstract
Increasing operating temperature plays a critical role in improving the thermal efficiency of gas turbines. This paper assesses the capability of advanced thermal barrier coatings being developed for use in 1700 °C class gas turbines. Parts sprayed with these coatings were evaluated and found to have excellent durability and long-term reliability.
PELATIHAN EMOTIONAL INTELLIGENCE UNTUK MENINGKATKAN TEACHER EFFECTIVENESS PADA GURU SEKOLAH DASAR
Authors: Tupan Cindy Adhianty , Alfinuha Setyani 
Published: September 2021

Peran guru sangat penting dalam mendukung performa akademik dan prestasi siswa. Pentingnya peran guru terkadang tidak diimbangi dengan keterampilan efektivitas guru dalam mengajar (teacher effectiveness). Pengukuran awal penelitian yang dilakukan menunjukkan hasil bahwa teacher effectiveness tergolong rendah. Padahal teacher effectiveness penting dimiliki guru untuk menunjang proses mengajar. Oleh karena itu peneliti berupaya memberikan pelatihan emotional intelligence untuk meningkatkan teacher effectiveness. Penelitian ini bertujuan untuk mengetahui efektivitas pelatihan emotional intelligence dalam meningkatkan teacher effectiveness pada guru. Partisipan penelitian ini berjumlah 21 guru di salah satu sekolah dasar di Surabaya. Penelitian ini merupakan sebuah quasi-experiment dengan menggunakan non-randomized one group pre-test post-test design. Pelatihan terdiri dari enam sesi yang dibagi dalam tiga pertemuan. Metode pengolahan data yang digunakan dalam penelitian ini adalah uji beda menggunakan aplikasi SPSS 16.0. Hasil intervensi menunjukkan bahwa terjadi peningkatan teacher effectivenesspada guru setelah diberikan pelatihan. Follow-up dilakukan dua minggu setelah pelatihan diberikan. Hasil follow-up menunjukkan bahwa tingkat teacher effectiveness cenderung tetap sehingga dapat disimpulkan bahwa efek pelatihan relatif bertahan pada partisipan penelitian.
Locum tenens of the patriarchal throne metropolitan of Kazan and Sviyazhsk Ephraim and the way of the Russian church in the Time of Troubles
Authors: Веретенников Макарий 
Published: September 2021

В статье раскрывается в историческом ключе образ митрополита Казанского и Свияжского Ефрема. Рассказ о нем тесно переплетен с изложением событий Смутного времени. Митрополит Ефрем явился последователем священномученика Гермогена в крепкой защите Православия и в любви к Родине. Малый период его местоблюстительства вместил в себя очень важные для государства решения и дела. Статья призвана пробудить более глубокий интерес к личности митрополита Ефрема как у ученых, так и у широкой читательской аудитории.
The article reveals the historical image of Metropolitan Ephraim of Kazan and Sviyazhsk. His story is closely intertwined with the sequence of events of the Time of Troubles. Metropolitan Ephraim was a follower of the martyr Hermogenes in his strong defense of Orthodoxy and in his love for the Motherland. The short period of his locum tenens was made up by the very important decisions and actions. The article is intended to arouse a deeper interest in the personality of Metropolitan Ephraim from both scholars and a wide readership.
St. Basil the Great as the author of the anaphora
Authors: Копейкин Иоанн 
Published: September 2021

В статье рассматривается вопрос о происхождении анафоры святителя Василия Великого в рамках трех основных подходов: исторического, литургико-критического и догматического. Обобщая результаты, достигнутые в рамках каждого из этих подходов, автор отвечает на вопрос, в какой мере возможно сравнительное изучение анафоры, сохранившейся под именем святителя Василия, и подлинных богословских творений этого отца Церкви.
The article deals with the question of the origin of the anaphora of St. Basil the Great within the framework of three main approaches: historical, liturgical-critical and dogmatic. Summarizing the results achieved in each of these approaches, the A. answers the question of the extent to which a comparative study of the anaphora, preserved under the name of St. Basil, and the true theological works of this father of the Church is possible.
Review of: Skinner K. Sources of modern political thought in 2 vol. Vol. 1: The Renaissance / Trans. from Eng. A. A. Oleynikov. 464 p.; Vol. 2: CONTENTS The Reformation / Trans. from Eng. A. A. Yakovlev. 568 p. M., 2018.
Authors: Задорнов А. 
Published: September 2021

Выход перевода на русский язык исследования Квентина Скиннера, впервые изданного сорок лет назад, рождает закономерный вопрос о его актуальности и том контексте, который этот двухтомник неизбежно обрел с момента первого издания. Если ответ на первый вопрос очевиден: в русскоязычной литературе это пока единственное специальное фундаментальное исследование политической мысли Ренессанса и Реформации (конец XIII — начало XVI вв.), — то с контекстом дело обстоит сложнее.Целью данного труда автор считает решение трех задач: анализ источников по истории политической мысли Средневековья и раннего Модерна, формулировка на основе этих текстов новоевропейского концепта «государства» и презентация особого авторского подхода в области интерпретации исторических текстов.
The Russian translation of Quentin Skinner's study, first published forty years ago, raises the legitimate question of its relevance and the context which this two-volume work has inevitably acquired since the first edition. While the answer to the first question is evident - it is so far the only special fundamental study of Renaissance and Reformation political thought in Russian-language literature (late thirteenth or early sixteenth century) - the context is more complex.
The aim of this work is to solve three problems: the analysis of sources on the history of political thought of the Middle Ages and early Modernity, the formulation on the basis of these texts of the New European concept of "state" and the presentation of the author's special approach in the field of interpretation of historical texts.
“Read books with all you soul!” Reading — a forgotten category of ascetical theology of St. Isaac the Syrian, Gregory of Sinai and Paisius Velichkovsky
Authors: Брискина-Мюллер А. М. 
Published: September 2021

Сие бо есть оучение Божие и истинное, еже каятися и плакатися грехов своих, и смирятися, и любити брата. Но откуду сего научишися, аще не читаеши ни единыя книги?2прп. Паисий ВеличковскийВ годы пребывания на Афоне прп. Паисия Величковского между ним и Афанасием Молдаванином, старцем одного скита, состоялась короткая полемическая переписка, в которой Афанасий пишет Паисию, что все ошибки у него - от учености; монаху надлежит, пишет он, просить Бога не о даре чтения, а о даре слез. Подробно ответив на прочие обвинения, Паисий отводит неожиданно много места опровержению представления о том, что монаху необязательно и даже вредно читать. Чтение заповедано Христом, пишет он, оно спасительно; чтение Священного Писания и святых отцов может взять на себя роль духовного отца в случае отсутствия такового, без чтения невозможно достичь покоя, научиться покаянию, узнать волю Божию, предохраниться от ереси. В своем ответе Паисий ссылается, в том числе, на прпп. Исаака Сирина и Григория Синаита. В статье предпринимается попытка рассмотреть мотив чтения в текстах трех преподобных. Все трое называют чтение одним из основных монашеских занятий, описывают духовные плоды чтения и богомыслия в категориях мистического богословия, приписывают чтению сотериологическое значение, а отказ от чтения считают ведущим к погибели.
In the years that St. Paisius Velichkovsky stayed on Mt. Athos, between him and Athanasius Moldavanin, the Elder of one of the monastery, there was a short polemical correspondence in which Athanasius wrote to Paisius that all his mistakes were from scholarship; the monk should, he writes, ask God not for the gift of reading, but for the gift of tears. Responding in detail to other accusations, Paisius unexpectedly allots a lot of space to refute the idea that it is not necessary and even harmful for a monk to read. Reading is commanded by Christ, he writes, it is salvatory; reading the Holy Scriptures and the Holy Fathers can take the place of the role of the spiritual father in the absence of such, it is impossible to achieve peace without reading, learn to repent, learn the will of God, protect yourself from heresy. In his answer, Paisius refers, among other things, to St. Isaac Syrian and Gregory of Sinai. The article attempts to consider the motive for reading texts of the three saints. All three call the act of reading one of the main monastic activities, describe the spiritual fruits of reading and divine thinking in the categories of mystical theology, attribute reading to the soteriological meaning, and refusingto read is considered to lead to death.