bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phase Composition Changes of Plasma Sprayed TiO2 Coatings Deposited under Different In-Flight Temperatures and Velocities
Authors: Cizek J. , Khor K.A. 
Published: December 2022

Abstract
Changes in phase composition of titania (TiO2) coatings were studied with respect to in-flight particle characteristics during atmospheric plasma spraying. A CCD camera was used to record the average temperature and velocity of TiO2 particles within the plasma jet for six combinations of spraying parameters selected according to Taguchi design of experiments. Phase composition of the coatings was assessed by means of X-ray diffractometry and numerically specified using Rietveld analysis. Changes in composition between the powders and coatings were observed with respect to the in-flight properties of the titania particles during spraying. In general, it was shown that the amount of impurity phases (hematite, quartz) present in the powder decreased after deposition and that in-flight temperature has only a moderate effect on the phase composition of TiO2 coatings. For comparison purposes, additional coatings were deposited by cold spraying and phase composition changes were assessed.
Characterization of Residual Stresses in Al and Al-Al2O3 Cold Sprayed Coatings
Authors: Rech S. , Trentin A. , Vezzù S. , Legoux J.-G. , Irissou E. , Arsenault B. , Lamontagne M. , Moreau C. , Guagliano M. 
Published: December 2022

Abstract
In the present work, pure Al and Al-Al2O3 composite coatings are deposited by cold spraying while measuring in-flight particle velocities. Residual stresses, evaluated using the Almen curvature method, X-day diffraction, and modified layer removal, are correlated with particle velocity, coating thickness, and alumina content. Peening stresses due to plastic deformation were estimated to be less than 100 MPa and are shown to be nearly constant through the thickness of the coatings.
High Temperature Behavior of Newly Developed Oxide Dispersion Strengthened NiCoCrAlY Coatings
Authors: Bobzin K. , Schläfer T. , Richardt K. , Brühl M. 
Published: December 2022

Abstract
This work demonstrates the capabilities of oxide dispersion strengthened MCrAlY coatings and the process used to produce the feedstock powders. Mechanically alloyed powder mixtures were prepared in a high-energy ball mill using commercial NiCoCrAlY and YPSZ powders combined in different amounts. A high-velocity oxyfuel torch was used to deposit the powders on Inconel substrates that were then heat treated for 6 h at 1050 °C. Samples were also produced from unaltered NiCoCrAlY powder to serve as a reference. In high-temperature erosion tests, the strengthened coatings had a mass loss of 47 mg/cm2 after 30 sec compared to 38 mg/cm2 for the unstrengthened sample. High-temperature corrosion tests showed that the strengthened coatings were not dense enough to protect the substrate from oxidation. The hard phases inhibited sintering and diffusion effects during heat treatment. As a result, dislocations, defects, and voids could not move and were used by oxygen for diffusion. In further investigations, the strengthened coatings will be treated at a higher temperature to achieve a better sintering effect.
Influence of the Substrate Hardness on the Rolling Contact Fatigue of WC-17%Co Hardmetal Coatings
Authors: Berger L.-M. , Lipp K. , May U. 
Published: December 2022

Abstract
In this paper, as part of a systematic study on the rolling contact fatigue of HVOF-sprayed hardmetal coatings, the behavior of WC-17%Co coatings on hardened and nonhardened substrates is compared. To obtain a meaningful assessment, the coatings were applied to roller specimens made from soft as well as case-hardened MnCr steel. Two coating thicknesses were used with the expectation that maximum stress will occur in the substrate, in one case, and in the other case, in the coating. Test results show that the durability of HVOF-sprayed WC-Co is significantly better on nonhardened (soft) substrates and that the limiting factor for endurable Hertz pressure is the fatigue strength of the coating.
Tribological Properties of HVOF Sprayed Tungsten Carbide Coatings after EDM Process
Authors: Żórawski W. , Radek N. 
Published: December 2022

Abstract
This study investigates the tribological properties of two HVOF-sprayed tungsten carbide coatings, each with a different content of cobalt, which were subjected to electrical discharge machining (EDM). It was found that the electrospark deposition of WC8Co over the HVOF-sprayed WC12Co and WC17Co coatingsresults in the formation of a homogeneous layer of tungsten carbide with a low cobalt content. The EDM layer is well bonded with the HVOF-sprayed coating as confirmed by the gradual change in the content of the elements in the coating and layer. The friction coefficients obtained for the two coatings with the EDM layer are very similar as their composition, microstructure, hardness, and surface roughness are approximately the same.
Effects of Heat Treatment on the Mechanical Properties of Plasma-Sprayed 316L Coatings
Authors: Tian B.-H. , Chang L. , Qu W.-L. , Gao Y. 
Published: December 2022

Abstract
To improve the mechanical properties of 316L stainless steel coatings prepared by plasma spraying, post-spray heat treatments were conducted at 600-800 °C for 1-2 hours. The effect on microstructure and hardness was assessed via XRD and SEM analysis and microhardness measurements. The results show that heat treatment at various temperatures improved coating hardness as well as fracture behavior.
Ecodesign of Surface Coatings: How to Conciliate Environmental and Technical Performances?
Authors: Serres N. , Hlawka F. , Cornet A. , Costil S. , Langlade C. , Machi F. 
Published: December 2022

Abstract
The aim of this study is to propose coatings that could potentially replace hard chromium as a means of corrosion and wear protection. Two NiCrBSi coatings are evaluated, one produced by laser cladding, the other by atmospheric plasma spraying with a post-laser treatment. Although laser-clad NiCrBSi exhibits the best technical properties, the APS coatings were found to be more environmentally justifiable based on the use of life cycle assessment (LCA) software.
Recent Application of Thermal Spray to Thermal Power Plants
Authors: Notomi A. , Sakakibara N. , Torigoe T. 
Published: December 2022

Abstract
This paper presents recent developments in thermal spray coating technology for thermal power plants. As for thermal barrier coatings for gas turbines, to accommodate the high gas temperatures required to improve thermal efficiency, a new ceramic topcoat material with low conductivity was developed. As for wear-resistant coatings for boiler parts, a C-Cr-Fe alloy coating was developed that is lower in cost than conventional chromium carbide cermet. Field tests of boiler parts show that the erosion wear rates of these coatings are as good or better than that of conventional cermet.
Drag Reduction and Self-Cleaning of Thermal Sprayed Surfaces by the Combination of Materials with Positive and Negative Thermal Expansion Coefficients
Authors: Wilden J. , Jahn S. , Drescher V.E. , Schaaf P. 
Published: December 2022

Abstract
This work investigates some of the unique properties that can be achieved by combining materials with positive and negative thermal expansion coefficients. In the experiments, different mixtures of MCrAlY, WO3, and Y2O3 powders are deposited on stainless steel substrates by laser cladding and HVOF spraying. To facilitate the formation of negative expansion coefficient particles in a positive expansion coefficient matrix, nucleation centers are created by ion implantation followed by heat treating. SEM examination and XRD analysis of the coatings obtained confirm the viability of the processing approach.
External Ballistics of Powder under Detonation Spraying
Authors: Ulianitsky V. , Shtertser A. , Pervushin D. , Smurov I. 
Published: December 2022

Abstract
This study investigates the influence of spraying distance and substrate orientation on the formation of metallic coatings by detonation spraying. Deposition efficiency was determined for aluminum, copper, titanium, and steel powders sprayed at different distances on substrates oriented at different angles. The results show that detonation products maintain their influence on sprayed particles even outside the barrel despite the pulsed nature of the detonation spraying process. Numerical calculations of particle acceleration and heating inside the barrel are performed for several materials and a theory of the processes outside the barrel is proposed. Optimal spraying parameters allowing 60-80% deposition efficiency are defined and experimentally validated for the materials studied.
Laser Remelting Modification of HVOF Sprayed WC-Based Cermet Coatings
Authors: Tan X.H. , Sun J.S. 
Published: December 2022

Abstract
WC-based cermet coatings were deposited by HVOF spraying in order to study the effects of laser remelting on coating microstructure, hardness, and dry sliding wear behavior. It was found that the laser treatment eliminates porosity and contributes to increased hardness and enforced metallurgical fusion between the coating and substrate, effectively improving adhesion and wear resistance.
Coatings for Polymer Turbine Blades
Authors: Dixit S. , Chin M. , Dixit R. 
Published: December 2022

Abstract
Erosion-resistant coatings on high-temperature polymer matrix composites are of great interest for turbine blade applications. This study evaluates the erosion resistance of thermal spray coatings using conventional weight loss methods in order to compute net erosion volume loss and assess thermal cycling durability. During erosion tests, coated polymer composite coupons were subjected to runway sand and aluminum oxide erodent at different temperatures and angles of incidence. Erosion test data are reported along with the results of coated polymer matrix composite blades.
The Effect of Toughness on Wear Resistance of Alumina-Titania Coatings Obtained by APS
Authors: Vargas F. , López M.E. , Ageorges H. , Fauchais P. 
Published: December 2022

Abstract
In the present work, the effect of coating toughness on the wear resistance of alumina-titania coatings was studied. Two parameters were modified: Al2O3-TiO2 ratio and particle size distribution. Coatings were obtained by atmospheric plasma spraying on a carbon steel disc. Coating toughness was measured by indentation tests, while wear resistance was determined by ball-on-disc measurements. The results show that coatings with higher toughness exhibit better wear resistance.
Sex-related differences in motor control strategies during isometric contractions in the Sorensen test posture with different external loading
Authors: Hinnekens Simon , Bara Julie , Scheen Pauline , Hidalgo Benjamin 
Published: December 2022

BACKGROUND: There is a sex-related difference in strength and endurance in trunk muscles: males have more strength while females have more endurance. OBJECTIVE: Investigate sex-related differences in motor control strategies in back muscles during isometric contractions (IC) in the Sorensen test posture. METHODS: Thirty-six healthy and young volunteers performed different tasks: three maximal voluntary contraction (MVC) tests recorded with a bio-feedback force sensor, and followed by five loaded IC (LIC) tests using bodyweight and loads of 0 to 8 kg with a 2-kg step. Surface electromyography was used to measure the activity of bilateral lumbar paravertebral (LP) and quadratus lumborum (QL) muscles. RESULTS: Sex-related and load-related differences in EMG amplitudes were highlighted during LIC tests. Females showed significantly (p-value = 0.02) greater EMG amplitude for the highest load (8 kg) than males. Besides, significant differences between low (2 and 4 kg) and high (6 and 8 kg) loads for both LP and QL muscles and for both sexes were observed. Finally, for MVC tests, males produced significantly (p-value = 1.02e-4) greater strength during MVC tests (4.25 ± 1.37 N/kg vs 2.60 ± 0.78 N/kg). CONCLUSION: The results were clinically relevant to bring attention to load strategy during rehabilitation, particularly in females who seemed to recruit the QL muscle more.
Software-driven secure framework for mobile healthcare applications in IoMT
Authors: Krishna T. Bala Murali , Praveen S. Phani , Ahmed Shakeel , Srinivasu Parvathaneni Naga 
Published: December 2022

The traditional healthcare systems require more data storage and not a quick responsive mode. The new era of intelligent healthcare systems uses advanced frameworks and devices to work with Internet of things (IoT), Cloud Computing, edge computing devices, and the Internet of Medical Things (IoMT). These technology adoptions may drastically increase healthcare systems performance and are available anytime and anywhere to replace traditional medical methods – the organizations in the network exchange the patient data that has been gathered. The healthcare systems are therefore susceptible to a variety of threats. The attacker may exploit many attacks during the transmission. This paper introduces a novel mechanism of A Secure Robust Privacy-Preserving Authentication and Key Agreement Framework for Mobile Healthcare Applications. The proposed framework collects the patient’s data using wearable devices called sensors, and the collected data is shared with various entities using a secure mechanism. The proposed framework uses Elliptic Curve Cryptography (ECC). Digital sign is created and validated through the Elliptic Curve Digital Signature Algorithm (ECDSA). Security properties of the proposed framework are analyzed through standard model checking tool Automated Validation of Internet Security Protocols (AVISPA). The suggested protocol is simple to develop and can withstand network-related threats.
Estimation of double-differential cross-sections of 9Be(p,xn) reaction for new nuclear data library JENDL-5
Authors: Kunieda Satoshi , Yamamoto Kazuyoshi , Konno Chikara , Iwamoto Yosuke , Iwamoto Osamu , Wakabayashi Yasuo , Ikeda Yujiro 
Published: December 2022

Double-differential cross-sections of the 9Be(p,xn) reaction are newly evaluated based on the Wakabayashi’s function and neutronics analysis up to 12 MeV for a new nuclear data library, JENDL-5. We devoted our efforts especially to the re-optimization of the absolute cross-sections and the interpolation of the neutron energy spectra. Through the comparisons between the thick target yield measurements and Monte-Carlo simulations at different proton energies and neutron emission angles, we conclude that JENDL-5 gives the best evaluation in the world.
VITA high flux neutron source for various applications
Authors: Bikchurina Marina , Bykov Tymofey , Byambatseren Enkhtsetseg , Ibrahem Ibrahem , Kasatov Dmitrii , Kolesnikov Iaroslav , Konovalova Viktoriia , Koshkarev Alexey , Makarov Aleksandr , Ostreinov Georgii , Savinov Sergey , Sokolova Evgeniia , Sorokin Igor , Shchudlo Ivan , Sycheva Tatiana , Verkhovod Gleb , Taskaev Sergey 
Published: December 2022

A high flux neutron source based on a vacuum-insulated tandem accelerator (VITA) and a lithium target has been proposed and developed at the Budker Institute of Nuclear Physics in Novosibirsk, Russia. We describe VITA which provides a dc proton/deuteron beam with an energy within a range of 0.6–2.3 MeV with a current from 1 nA to 10 mA. VITA is also capable of producing α-particles through the 7Li(p,α)α and 11B(p,α) α α reactions, 478 keV photons through the 7Li(p,p ′ γ)7Li reaction and positrons through the 19F(p,e+e−)16O reaction. We present several applications of this source: boron neutron capture therapy, nuclear cross sections determination, lithium target study, radiation blistering of metals during proton implantation and the radiation testing of promising materials.
Tourism GDP for 2010 to 2020: New TSA results for Greece
Authors: Hackl Peter , Hatzimarinakis Stavros 
Published: December 2022

In many countries, early attempts in implementing TSA Tables suffer from limitations in available data. For Greece, pilot TSA Tables 1 to 6 were implemented in an EU-funded project for the reference year 2015. However, TSA Table 6 could not be implemented in all details, mainly due to limited resources of ELSTAT, the national statistical office. TSA Tables were not implemented for the years after 2015, partly due to needs for improving the TSA-related database which were revealed in the pilot project. Our paper presents methods for implementing the TSA Table 6 given only limited data on tourism expenditures and Supply and Use Tables and provides estimates of the Tourism Direct GPD for 2010 through 2020. Besides the methodological approach, our results show a rather pleasing picture of Greek tourism. In the years 2010 to 2019, Tourism Direct GDP was steadily growing and increased from 7,026 to 10,994 million Euros, an average annual growth rate of 5.1%; the GDP decreased annually by 2.2% on average. The TDGVA ratio increased from 3.1% to 5.5% and the TDGDP ratio from 3.1% to 6.0%, the average annual growth rate of the Tourism Direct GVA and GPD ratios amounting to 6.7% and 7.5%, respectively.
Impact of the COVID-19 Pandemic on Tertiarycare University Dermatology Outpatient Clinic and Dermatology Procedures
Authors: Wamaphutta Kingkaew , Thasen Chowalit , Sereeaphinan Chudapa , Chaweekulrat Pichanee , Boonchai Waranya 
Published: December 2022

Objective: This study aimed to determine the changes in patient characteristics, disease prevalence, and dermatology procedures during the COVID-19 pandemic.
Materials and Methods: We retrospectively reviewed the demographic data, diagnoses, and dermatology procedures of the patients who visited an outpatient dermatology clinic between March 1, 2018, and December 31, 2021. Changes in the number of patients, the patterns of diagnosis, and the dermatology procedures were analyzed.
Results: The number of patients decreased at the start of each of the 4 COVID-19 waves that occurred during the study period. Older adults increased their dermatology visits during the pandemic. The skin disease with the highest proportional increase in the frequency of visits was cutaneous T-cell lymphoma. The proportion of noncosmetic procedures significantly increased, in contrast to a decrease in the proportion of cosmetic procedures.
Conclusion: The COVID-19 pandemic significantly affected outpatient dermatology by changing the setting and frequency of patient visits to the outpatient clinic, the pattern of the diseases, and the dermatology procedures.
Comparison of solid and liquid fractions of pretreated Norway spruce as reductants in LPMO-supported saccharification of cellulose
Authors: Tang Chaojun , Gandla Madhavi Latha , Jönsson Leif J. 
Published: December 2022

The role of lignin in enzymatic saccharification of cellulose involving lytic polysaccharide monooxygenase (LPMO) was investigated in experiments with the solid and liquid fractions of pretreated Norway spruce from a biorefinery demonstration plant using hydrothermal pretreatment and impregnation with sulfur dioxide. Pretreated biomass before and after enzymatic saccharification was characterized using HPAEC, HPLC, Py-GC/MS, 2D-HSQC NMR, FTIR, and SEM. Chemical characterization indicated that relatively harsh pretreatment conditions resulted in that the solid phase contained no or very little hemicellulose but considerable amounts of pseudo-lignin, and that the liquid phase contained a relatively high concentration (∼5 g/L) of lignin-derived phenolics. As judged from reactions continuously supplied with either air or nitrogen gas, lignin and lignin fragments from both the solid and the liquid phases efficiently served as reductants in LPMO-supported saccharification. When air was used to promote LPMO activity, the enzymatic conversion of cellulose after 72 h was 25% higher in reactions with pretreated solids and buffer, and 14% higher in reactions with pretreatment liquid and microcrystalline cellulose. Research in this area is useful for designing efficient saccharification steps in biochemical conversion of lignocellulosic biomass.
The first-line antituberculosis drugs, and their fixed-dose combination induced abnormal sperm morphology and histological lesions in the testicular cells of male mice
Authors: Bakare Adekunle A. , Moses Victoria Y. , Beckely Charles T. , Oluyemi Toluwani I. , Ogunfeitimi Gift O. , Adelaja Aduragbemi A. , Ayorinde Glory T. , Gbadebo Adeyinka M. , Fagbenro Olukunle S. , Ogunsuyi Olusegun I. , Ogunsuyi Opeoluwa M. , Ige Olusoji Mayowa 
Published: December 2022

Rifampicin (RIF), Isoniazid (INH), Ethambutol (EMB), Pyrazinamide (PZA), and/or their fixed-dose combination (FDC) are extensively prescribed in the cure of Tuberculosis (TB) globally. In spite of the beneficial effect, these drugs are capable of inducing cellular toxicity. Existing information on the genotoxic effects of the first-line anti-TB drugs is limited and contentious. Herein, we evaluated the reproductive genotoxicity of RIF, INH, EMB, PZA, and their FDC utilizing the mouse sperm morphology assay. Histological examination of the testes of exposed mice was also performed. Male Swiss albino mice (11–13 weeks old) were intraperitoneally exposed for 5 consecutive days to each of the anti-TB drugs at four different doses of 6.25, 12.5, 25, and 50 mg/kg bw of PZA; 2.5, 5.0, 10, and 20 mg/kg bw of RIF; 1.25, 2.5, 5.0 and 10 mg/kg bw of INH; 3.75, 7.5, 15 and 30 mg/kg bw of EMB; and 7, 14, 28 and 56 mg/kg bw of FDC corresponding respectively to ×0.25, ×0.5, ×1 and ×2.0 of the standard daily dose. In comparison with the negative control (normal saline), there was no significant difference in the testicular weight and organo-somatic index of exposed mice. There was an increase (p&gt; 0.05) in the frequency of abnormal spermatozoa at most of the tested doses of each drug and a dose-dependent decrease with the FDC. Each of the anti-TB drugs except the FDC induced pathological lesions in the testes. These findings suggest that the individual first-line anti-TB drug unlike the FDC has the potential to provoke testicular anomalies in male mice.
Alloying effect of Ni-Mo catalyst in hydrogenation of N-ethylcarbazole for hydrogen storage
Authors: Wang Bin , Dong Qian , Wang Si-Yao , Li Pei-Ya , Wang Shi-Yuan , Lu Shu-Han , Fang Tao 
Published: December 2022

Liquid organic hydrogen storage with N-ethylcarbazole (NEC) as a carrier is a very promising method. The use of precious metal hydrogenation catalysts restricts the development in industrial grade. Efficient and low-cost hydrogen storage catalysts are essential for its application. In this work, a Ni-Mo alloy catalyst supported by commercial activated carbon was synthesized by impregnation method, and the Ni-Mo ratio and preparation conditions were optimized. The catalyst was characterized by XRD, XPS, H2-TPR, SEM, and TEM. The results showed that the doping of Mo could dramatically promote the catalytic hydrogenation of N-ethylcarbazole by the Ni-based catalyst. More than 5.75 wt% hydrogenation could be achieved in 4 h using the Ni-Mo catalyst, and the selectivity of the fully hydrogenated product 12H-NEC could be effectively improved. This result reduces the cost of hydrogenation catalysts by more than 90% and makes liquid organic hydrogen storage a scaled possibility.