Powder Metallurgy Progress最新文献

Announcements: Professor RNDr. Ján Dusza, DrSc – 70 years jubeeleum 公告：RNDr.教授。Ján Dusza，博士–70岁

Powder Metallurgy Progress Pub Date : 2023-06-01 DOI: 10.2478/pmp-2022-0001

引用次数: 0

Micromechanical Properties of Reactive HiTUS TiNbVTaZrHf–N Coatings on Different Substrates 不同基材上反应性HiTUS TiNbVTaZrHf-N涂层的微观力学性能

Powder Metallurgy Progress Pub Date : 2023-06-01 DOI: 10.2478/pmp-2022-0005

František Lofaj, Tamás Csanádi, Lenka Kvetková, Petra Hviščová, Margita Kabátová, Alexandra Kovalčíková, Marek Vojtko, Vladimir Girman

{"title":"Micromechanical Properties of Reactive HiTUS TiNbVTaZrHf–N Coatings on Different Substrates","authors":"František Lofaj, Tamás Csanádi, Lenka Kvetková, Petra Hviščová, Margita Kabátová, Alexandra Kovalčíková, Marek Vojtko, Vladimir Girman","doi":"10.2478/pmp-2022-0005","DOIUrl":"https://doi.org/10.2478/pmp-2022-0005","url":null,"abstract":"Abstract High entropy ceramic coatings, including multicomponent transition metal nitrides called also high entropy nitrides (HEN), are usually deposited using reactive arc and/or DC magnetron (co)sputtering. High Target Utilization Sputtering (HiTUS) was not applied in HEN systems up to now. Subsequently, the mechanical properties of HEN coatings prepared by HiTUS are also not known. The transition metals from the 4 th and 5 th group of the periodic table (Ti, Zr, Hf, Nb, V, and Ta) are strong nitride formers which would be the most suitable for HEN coating systems and therefore, investigation of their properties would be of significant interest. However, the nanoindentation measurements on thin coatings always produce „composite“ values involving the contribution from the substrate. The separation of the coating properties from composite values requires upgraded analytical approaches different from standard Oliver & Pharr analysis. Thus, the aim work is to investigate the structure, hardness, and elastic modulus of TiZrHfNbVTa–xN coatings with different nitrogen stoichiometry deposited by reactive HiTUS using both CSM for bulk and CSM for thin films methods and to compare the results obtained on 4 different substrates (Si wafer, sapphire, 100Cr6 steel, and Ti6Al4V alloy). The subsequent results showed systematic differences in the calculated mechanical properties depending on the substrate properties both in CSM and CSMTF modes. Stiffer substrates always resulted in the overestimations of the calculated hardness and indentation modulus compared to softer substrates with lower Young’s modulus and the differences were in the range of around 10 %. Obviously, better theoretical models for the calculations of true coating properties are required.","PeriodicalId":52175,"journal":{"name":"Powder Metallurgy Progress","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135195314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fracture Toughness of Cement Paste Assessed with Micro-Scratch and Acoustic Emission 用微划痕和声发射评价水泥浆体的断裂韧性

Powder Metallurgy Progress Pub Date : 2023-06-01 DOI: 10.2478/pmp-2022-0002

J. Němeček, R. Čtvrtlík, L. Václavek

引用次数: 0

Evaluation of Residual Stress and Tensile Properties of Railway Axle Using Instrumented Indentation Method 用仪器压痕法评价铁路车轴的残余应力和拉伸性能

Powder Metallurgy Progress Pub Date : 2023-06-01 DOI: 10.2478/pmp-2022-0003

D. Bartonek, M. Négyesi, B. Strnadel

引用次数: 1

The Influence of Tilt on Berkovich Indentation of a Steel Sample Using FEM Analysis and Nanoindentation 利用有限元分析和纳米压痕研究倾斜对钢试样Berkovich压痕的影响

Powder Metallurgy Progress Pub Date : 2023-06-01 DOI: 10.2478/pmp-2022-0007

Jaroslav Kovář, Vladimír Fuis, Radim Čtvrtlík, Jan Tomáštík

引用次数: 0

Investigation of Hybrid Lap Welds of TI6AL4V and Stainless Steel with Bronze Interlayer TI6AL4V与不锈钢复合搭接焊青铜夹层的研究

Powder Metallurgy Progress Pub Date : 2023-06-01 DOI: 10.2478/pmp-2022-0006

Hana Chmelíčková, Martina Havelková, Aneta Hrubantová, Vlastimil Jílek, Lukáš Václavek, Tomáš Ingr

引用次数: 0

Effect of Machining on Mechanical Properties of Borosilicate Glasses 加工对硼硅酸盐玻璃力学性能的影响

Powder Metallurgy Progress Pub Date : 2023-06-01 DOI: 10.2478/pmp-2022-0008

Lukáš Václavek, Jan Tomáštík, Radim Čtvrtlík

{"title":"Effect of Machining on Mechanical Properties of Borosilicate Glasses","authors":"Lukáš Václavek, Jan Tomáštík, Radim Čtvrtlík","doi":"10.2478/pmp-2022-0008","DOIUrl":"https://doi.org/10.2478/pmp-2022-0008","url":null,"abstract":"Abstract Although optical properties are essential for materials for optical purposes, their mechanical properties must also be considered as they directly govern their practical applicability as well as their machining. The machining of optical glasses is mainly carried out by mechanical removal of the material using free or bonded abrasives. The relationship between the local mechanical properties of three types of borosilicate glasses used to produce optical elements (mirrors) and the type of surface machining was investigated. The samples were machined using two approaches, namely 7-axis CNC surface machining and conventional manual machining. Advanced analysis of nano/micro-mechanical properties was performed on glass samples using quasi-static nanoindentation and microindentation and dynamic impact test complemented by the analysis of the acoustic emission signals generated during the mechanical tests. The results show a difference in mechanical properties between industrial and optical borosilicate glasses. The type of machining has a strong influence on studied mechanical properties and surface quality. Glasses manufactured by CNC have more pronounced acoustic emission signal and crack more than glasses manufactured by hand. The different behavior of hand- and CNC-machined surfaces can be linked to different subsurface damage caused by different contact conditions between the workpiece and the instrument/abrasive. As a result, a different density of surface and especially (near)-subsurface flaws are present in the glass. Simax is slightly softer than BG33 glass, which together with the less pronounced AE may indicate a lower amount of subsurface cracks/damage.","PeriodicalId":52175,"journal":{"name":"Powder Metallurgy Progress","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135195313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Sintering Time on Mechanical Properties of (Hf-Ta-Zr-Nb-Ti)C 烧结时间对(Hf-Ta-Zr-Nb-Ti)C力学性能的影响

Powder Metallurgy Progress Pub Date : 2021-12-01 DOI: 10.2478/pmp-2021-0006

Lenka Ďaková, M. Hrubovčáková, R. Sedlák, A. Kovalčíková, Ľ. Medvecký, A. Naughton-Duszová, I. Vasková, J. Dusza

引用次数: 0

Combined Effect of Phosphate and Polymer Coating on Cytotoxicity and Hemocompatibility of Iron Foams 磷酸盐和聚合物涂层对泡沫铁细胞毒性和血液相容性的联合影响

Powder Metallurgy Progress Pub Date : 2021-12-01 DOI: 10.2478/pmp-2021-0005

R. Oriňaková, R. Gorejová, Martina Petráková, J. Macko, M. Kupková, M. Hrubovčáková, I. Maskalová

{"title":"Combined Effect of Phosphate and Polymer Coating on Cytotoxicity and Hemocompatibility of Iron Foams","authors":"R. Oriňaková, R. Gorejová, Martina Petráková, J. Macko, M. Kupková, M. Hrubovčáková, I. Maskalová","doi":"10.2478/pmp-2021-0005","DOIUrl":"https://doi.org/10.2478/pmp-2021-0005","url":null,"abstract":"Abstract The use of resorbable metallic biomaterials for temporary implants has increased dramatically in the last decade. Degradable biomaterials are desirable in some specific pediatric, orthopedic, and cardiovascular applications, in which they may overcome the disadvantages of permanent devices. The three main biodegradable metals: Mg, Fe, and Zn, are intensively studied as temporary orthopedic implant materials. Among them, iron, and iron-based alloys, have received attention as promising materials for the temporary replacement of bones, especially for applications where strong mechanical support during the bone healing process is required. The addition of a low amount of phosphorus can improve the mechanical properties of such materials without the risk of retarding the corrosion rate or affecting cell proliferation. The main goal of this work was to study the combined effect of phosphating and polymer coating of open-cell iron foams on their cytotoxicity and hemocompatibility. Obtained results indicated the positive influence of the PEG coating layer and phosphorus addition on material cytocompatibility. Moreover, the combination of these procedures led to the inhibition of hemolysis, platelet adhesion, and thrombus formation.","PeriodicalId":52175,"journal":{"name":"Powder Metallurgy Progress","volume":"21 1","pages":"39 - 49"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41859663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Announcements: Eva Dudrová – 80 years 公告：Eva Dudrová–80岁

Powder Metallurgy Progress Pub Date : 2021-12-01 DOI: 10.2478/pmp-2021-0007

M. Kupková, P. Hvizdoš

引用次数: 0