Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1433
G. Q. Xu, C. Q. Li, F. J. Wang, J. F. Ou, Z. Y. Xue, A. Amirfazli
The problem of bacterial adhesion has been a challenge in everyday life and industry for decades. In this paper, polytetrafluoroethylene(PTFE) micropowder, titanium dioxide(TiO2) nanopowder, ethyl acetate and epoxy resin were sequentially added to a beaker and stirred well, then the nanoparticles were modified using perfluorooctyltriethoxysilane (POTS), and finally superhydrophobic coatings were fabricated on the surface of an aluminium sheet by spraying process. Characterisation was carried out using scanning electron microscopy and contact angle measurement, and the coating wettability, chemical stability and mechanical stability properties were investigated, and finally the coating was tested for antimicrobial properties. The study suggests that the hydrophobicity of the sample was optimal at a contact angle of 163.3° and a rolling angle of 3.2° when the ratio of PTFE micropowder to nano-TiO2 by mass was 1:4 and the ration between POTS and nanoparticles by mass was 12%. The contact angles were 137.8° and 143.6° after 25 and 32 hours of soaked in an anhydrous solution with a pH of 14 and 1, respectively. Most importantly, it exhibits good antimicrobial properties.
{"title":"Preparation and properties of PTFE@TiO2/epoxy superhydrophobic coating","authors":"G. Q. Xu, C. Q. Li, F. J. Wang, J. F. Ou, Z. Y. Xue, A. Amirfazli","doi":"10.15251/djnb.2023.184.1433","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1433","url":null,"abstract":"The problem of bacterial adhesion has been a challenge in everyday life and industry for decades. In this paper, polytetrafluoroethylene(PTFE) micropowder, titanium dioxide(TiO2) nanopowder, ethyl acetate and epoxy resin were sequentially added to a beaker and stirred well, then the nanoparticles were modified using perfluorooctyltriethoxysilane (POTS), and finally superhydrophobic coatings were fabricated on the surface of an aluminium sheet by spraying process. Characterisation was carried out using scanning electron microscopy and contact angle measurement, and the coating wettability, chemical stability and mechanical stability properties were investigated, and finally the coating was tested for antimicrobial properties. The study suggests that the hydrophobicity of the sample was optimal at a contact angle of 163.3° and a rolling angle of 3.2° when the ratio of PTFE micropowder to nano-TiO2 by mass was 1:4 and the ration between POTS and nanoparticles by mass was 12%. The contact angles were 137.8° and 143.6° after 25 and 32 hours of soaked in an anhydrous solution with a pH of 14 and 1, respectively. Most importantly, it exhibits good antimicrobial properties.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"35 13","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138601551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1385
F. H. Jasim, H. R. Shakir, S. S. Chiad, N. Habubi, Z. S. A. Mosa, Y. H. Kadhim, M. Jadan
TiO2 and TiO2:Cu films were deposited by spray pyrolysis (SP). X-ray diffraction reveals that deposited films have a polycrystalline structural. The AFM image of the surface reveals that roughness and root mean square affected by doping. Optical transmission of films was found to decrease from 94 % to 84 % with the as the doping percentage increase to 3. Optical bandgap (Eg) of TiO2 thin film was 3.947eV. The bandgap is shifted to lower energies upon doping.
{"title":"Characterizations of sprayed TiO2 and Cu doped TiO2 thin films prepared by spray pyrolysis method","authors":"F. H. Jasim, H. R. Shakir, S. S. Chiad, N. Habubi, Z. S. A. Mosa, Y. H. Kadhim, M. Jadan","doi":"10.15251/djnb.2023.184.1385","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1385","url":null,"abstract":"TiO2 and TiO2:Cu films were deposited by spray pyrolysis (SP). X-ray diffraction reveals that deposited films have a polycrystalline structural. The AFM image of the surface reveals that roughness and root mean square affected by doping. Optical transmission of films was found to decrease from 94 % to 84 % with the as the doping percentage increase to 3. Optical bandgap (Eg) of TiO2 thin film was 3.947eV. The bandgap is shifted to lower energies upon doping.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"43 5","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1473
Z. W. Chen, J. L. Zhu, J. Liu, A. X. Wei
The FexMo1-xS2 nanosheets with different Fe doping content x were grown on carbon nanotubes @ carbon cloth (CNT@CC) substrate using a hydrothermal method by varying the molar ratio of FeSO4·7H2O to Na2MoO4·2H2O in the precursor solution. The effect on HER, OER and overall water splitting (OWS) performance of Fe doping content x were studied. The FexMo1-xS2 nanosheets have the optimal HER and OWS performance for x=0.050 and the optimal OER performance for x=0.075. The overpotential at current density of 100 mA/cm2 and Tafel slope are 198 mV and 44.7 mVdec-1 for HER; and they are 279 mV and 24.5 mV/dec for OER in 1 M KOH electrolyte. The electrolytic cell using Fe0.05Mo0.95S2/ CNT@CC as both cathode and anode achieves a voltage of 1.69 V at current density of 100 mAcm-2 . The bifunctional catalytic activities of the FexMo1-xS2/ CNT@CC catalyst come from the synergistic effect between FexMo1-xS2 nanosheets and CNT.
{"title":"FexMo1-xS2/CNT@CC nanosheets as an efficient bifunctional electrocatalyst for overall water splitting","authors":"Z. W. Chen, J. L. Zhu, J. Liu, A. X. Wei","doi":"10.15251/djnb.2023.184.1473","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1473","url":null,"abstract":"The FexMo1-xS2 nanosheets with different Fe doping content x were grown on carbon nanotubes @ carbon cloth (CNT@CC) substrate using a hydrothermal method by varying the molar ratio of FeSO4·7H2O to Na2MoO4·2H2O in the precursor solution. The effect on HER, OER and overall water splitting (OWS) performance of Fe doping content x were studied. The FexMo1-xS2 nanosheets have the optimal HER and OWS performance for x=0.050 and the optimal OER performance for x=0.075. The overpotential at current density of 100 mA/cm2 and Tafel slope are 198 mV and 44.7 mVdec-1 for HER; and they are 279 mV and 24.5 mV/dec for OER in 1 M KOH electrolyte. The electrolytic cell using Fe0.05Mo0.95S2/ CNT@CC as both cathode and anode achieves a voltage of 1.69 V at current density of 100 mAcm-2 . The bifunctional catalytic activities of the FexMo1-xS2/ CNT@CC catalyst come from the synergistic effect between FexMo1-xS2 nanosheets and CNT.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"83 15","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138604701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1327
N. Abbas, J. M. Zhang, S. Nazir, H. Akhtar, M. Zaqa, S. Saleem, G. Mustafa
Barium oxide have wide attention towards electronic device applications because of their exceptional structural, optical, electrical properties. Sol-gel process was used to prepare the nanocrystalline barium oxide. XRD investigation confirms that that the synthesized Barium oxide nanoparticles highly crystalline nature and have tetragonal structure. The crystal size measured by Scherrer formula and obtained values lies in the range (2.3- 6.7nm). The SEM micrographs revealed a reducing agglomeration and porosity with the enrichment in the doping content. IR analysis revealed that prepared samples have high purity while Raman spectra exhibited that the bands intensity of the synthesized nanoparticles was enhanced due to enhancement in force constant with the addition of doping content. UV-vis spectra analysis, performed to study the optical properties, revealed that optical band gap was decrease with increase of the doping content and obtained band gap results lies in the range (1.99-1.85 eV). Moreover, the conductivity of the prepared sample was observed increased from 7.28 × 10-5 Ʊ cm-1 to 1.79 × 10-3 Ʊ cm1, while the resistivity was decreased from 1.1 ×104 Ω cm to 5.58 ×102 Ω cm with the increasing of the doping content. The explored results exhibited that the doping iron content, enhanced the characteristics of prepared oxides. Such characteristics of BaO make a potential candidate for electronic device applications.
{"title":"Synthesis and characterization of Fe-substituting BaO nanoparticles by sol-gel method","authors":"N. Abbas, J. M. Zhang, S. Nazir, H. Akhtar, M. Zaqa, S. Saleem, G. Mustafa","doi":"10.15251/djnb.2023.184.1327","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1327","url":null,"abstract":"Barium oxide have wide attention towards electronic device applications because of their exceptional structural, optical, electrical properties. Sol-gel process was used to prepare the nanocrystalline barium oxide. XRD investigation confirms that that the synthesized Barium oxide nanoparticles highly crystalline nature and have tetragonal structure. The crystal size measured by Scherrer formula and obtained values lies in the range (2.3- 6.7nm). The SEM micrographs revealed a reducing agglomeration and porosity with the enrichment in the doping content. IR analysis revealed that prepared samples have high purity while Raman spectra exhibited that the bands intensity of the synthesized nanoparticles was enhanced due to enhancement in force constant with the addition of doping content. UV-vis spectra analysis, performed to study the optical properties, revealed that optical band gap was decrease with increase of the doping content and obtained band gap results lies in the range (1.99-1.85 eV). Moreover, the conductivity of the prepared sample was observed increased from 7.28 × 10-5 Ʊ cm-1 to 1.79 × 10-3 Ʊ cm1, while the resistivity was decreased from 1.1 ×104 Ω cm to 5.58 ×102 Ω cm with the increasing of the doping content. The explored results exhibited that the doping iron content, enhanced the characteristics of prepared oxides. Such characteristics of BaO make a potential candidate for electronic device applications.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"28 24","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1423
A. Phuruangrat, T. Thongtem, S. Thongtem
Visible-light-driven LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were synthesized by tartaric acid-assisted combustion method. Both ZnO and La/Al co-doped ZnO samples were indexed to the pure hexagonal wurtzite ZnO structure and were composed of nanoparticles with particle size ranges of 100-150 nm and 20-50 nm, respectively. The photocatalytic activities of ZnO and LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were monitored through the degradation of methylene blue (MB) under visible light irradiation. The La0.02Al0.01Zn0.97O nanoparticles have the highest photocatalytic activity in degrading of MB under visible light irradiation because the La/Al co-dopant played the role in creating shallow energy level under the conduction band of ZnO.
{"title":"Combustion synthesis and characterization of visible-light-driven La/Al co-doped ZnO nanoparticles used for wastewater treatment","authors":"A. Phuruangrat, T. Thongtem, S. Thongtem","doi":"10.15251/djnb.2023.184.1423","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1423","url":null,"abstract":"Visible-light-driven LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were synthesized by tartaric acid-assisted combustion method. Both ZnO and La/Al co-doped ZnO samples were indexed to the pure hexagonal wurtzite ZnO structure and were composed of nanoparticles with particle size ranges of 100-150 nm and 20-50 nm, respectively. The photocatalytic activities of ZnO and LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were monitored through the degradation of methylene blue (MB) under visible light irradiation. The La0.02Al0.01Zn0.97O nanoparticles have the highest photocatalytic activity in degrading of MB under visible light irradiation because the La/Al co-dopant played the role in creating shallow energy level under the conduction band of ZnO.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"19 9","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138603069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1493
S. R. Kadum, A. S. Baron, H. M. J. Haider
In this study, the Li[Li0.20Ni0.13Co0.13-yMn0.54-x]AlyInxO2 was synthesized via sol-gel method. electrochemical and structural attributes of nanopowders determined by the thermal analysis (TGA)/(DTA), structural analysis (XRD), (FESEM), chemical analysis (EDS) and (FTIR), BET analysis and their results appraised. X-ray diffraction analysis were performed to study the formation of nanopowders, illustrating the α- NaFeO2 structure with R¯3m space group. FESEM Figures showed that the nanopowders have a group of the cubic and the hexagonal particles. Chemical test of the EDS proved the existence of Aluminum and Indium. TGA/DTA tests for the displayed weight loss in the nanopowders. Infrared spectroscopy studied connectivity bonds and chemical elements that are utilized in the cathode. The powders with Al (y = 0.02) and In (x = 0. 01) represented the high cycling efficiency and have better discharge capacity. Li[Li0.20Ni0.13Co0.13-0.02Mn0.54-0.01]Al0.02In0.01O2 displayed the higher cycling consistency and the better capacity in collation with those of the nonreplacement powders. Electrochemical impedance spectroscopy (EIS) showed that adding the Indium-Aluminum impurities improved the electrochemical efficiency of the Li[Li0.20Ni0.13Co0.13Mn0.54]O2.
{"title":"Enhanced high performance of aluminum/indium Co-doped lithium nickel manganese cobalt oxide for possible batteries application","authors":"S. R. Kadum, A. S. Baron, H. M. J. Haider","doi":"10.15251/djnb.2023.184.1493","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1493","url":null,"abstract":"In this study, the Li[Li0.20Ni0.13Co0.13-yMn0.54-x]AlyInxO2 was synthesized via sol-gel method. electrochemical and structural attributes of nanopowders determined by the thermal analysis (TGA)/(DTA), structural analysis (XRD), (FESEM), chemical analysis (EDS) and (FTIR), BET analysis and their results appraised. X-ray diffraction analysis were performed to study the formation of nanopowders, illustrating the α- NaFeO2 structure with R¯3m space group. FESEM Figures showed that the nanopowders have a group of the cubic and the hexagonal particles. Chemical test of the EDS proved the existence of Aluminum and Indium. TGA/DTA tests for the displayed weight loss in the nanopowders. Infrared spectroscopy studied connectivity bonds and chemical elements that are utilized in the cathode. The powders with Al (y = 0.02) and In (x = 0. 01) represented the high cycling efficiency and have better discharge capacity. Li[Li0.20Ni0.13Co0.13-0.02Mn0.54-0.01]Al0.02In0.01O2 displayed the higher cycling consistency and the better capacity in collation with those of the nonreplacement powders. Electrochemical impedance spectroscopy (EIS) showed that adding the Indium-Aluminum impurities improved the electrochemical efficiency of the Li[Li0.20Ni0.13Co0.13Mn0.54]O2.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"26 6","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138604095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-30DOI: 10.15251/djnb.2023.184.1269
S. Benamora, M. Diafi, A. Touane, D. Sahnoune
The effects the concentration of lead on zinc-lead alloys obtained from sulphate baths under continuous current deposition are described. The deposit morphology was analyzed using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) was used to determine the preferred crystallographic orientations of the deposits. Protection against corrosion properties studied in a solution of 3 % NaCl in the potentiodynamic polarization measurements (Tafel), It has been observed that the Zn–Pb alloy is characterized by enhanced the resistance of corrosion compared to the Zn alloys and the addition of Pb in the Zn-Pb increases the micro-hardness, XRD and SEM results an identify any coatings Zn-Pb alloy composition reveals that. Zinc - rich (η- phase).
{"title":"The influence of lead concentration on the properties of the electrodeposited zinc–lead alloy coatings","authors":"S. Benamora, M. Diafi, A. Touane, D. Sahnoune","doi":"10.15251/djnb.2023.184.1269","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1269","url":null,"abstract":"The effects the concentration of lead on zinc-lead alloys obtained from sulphate baths under continuous current deposition are described. The deposit morphology was analyzed using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) was used to determine the preferred crystallographic orientations of the deposits. Protection against corrosion properties studied in a solution of 3 % NaCl in the potentiodynamic polarization measurements (Tafel), It has been observed that the Zn–Pb alloy is characterized by enhanced the resistance of corrosion compared to the Zn alloys and the addition of Pb in the Zn-Pb increases the micro-hardness, XRD and SEM results an identify any coatings Zn-Pb alloy composition reveals that. Zinc - rich (η- phase).","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"43 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-30DOI: 10.15251/djnb.2023.184.1203
Z. M. A. Abbas, W. A. Shatti, D. S. Kalaf
This work is to synthesize the cobalt ferrites nano powder of with the stoichiometric formula CoxFe2O4 (x= 0.8 and 1.4) by using sol-gel auto combustion method , and study structural and magnetic properties, the ferrite powders were calcined at 500, 600, and 700 °C for 3 hrs to remove organic waste and increase homogeneity and, The XRD diffraction analysis for CoxFe2O4 nanoferrites with single spinel structure. The crystal size of the formed crystallite of ferrite specimens increases with increasing temperature calcination and cobalt content , (FE-SEM) shows agglomerated with homogenous spherical and polyhedral particles. proportion of each of Fe ,Co, and O in all specimens is confirmed using the Energy Dispersive Spectrum (EDS),the magnetic characteristics are measured with a VSM. The remanence magnetization (Mr) saturation magnetization(Ms), and magnetic moment (nB) of CoxFe2O4 nanoferrites are found to go up with increasing calcination temperature, and E-coli bacteria were used to examine the inhibition of each ferrite using the diffusion-drilling agar method, as it is known that these nano powder possess therapeutic efficacy for numerous diseases.
{"title":"Synthesis of ferromagnetic material nano powder and study of its effect on antibacterial activity","authors":"Z. M. A. Abbas, W. A. Shatti, D. S. Kalaf","doi":"10.15251/djnb.2023.184.1203","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1203","url":null,"abstract":"This work is to synthesize the cobalt ferrites nano powder of with the stoichiometric formula CoxFe2O4 (x= 0.8 and 1.4) by using sol-gel auto combustion method , and study structural and magnetic properties, the ferrite powders were calcined at 500, 600, and 700 °C for 3 hrs to remove organic waste and increase homogeneity and, The XRD diffraction analysis for CoxFe2O4 nanoferrites with single spinel structure. The crystal size of the formed crystallite of ferrite specimens increases with increasing temperature calcination and cobalt content , (FE-SEM) shows agglomerated with homogenous spherical and polyhedral particles. proportion of each of Fe ,Co, and O in all specimens is confirmed using the Energy Dispersive Spectrum (EDS),the magnetic characteristics are measured with a VSM. The remanence magnetization (Mr) saturation magnetization(Ms), and magnetic moment (nB) of CoxFe2O4 nanoferrites are found to go up with increasing calcination temperature, and E-coli bacteria were used to examine the inhibition of each ferrite using the diffusion-drilling agar method, as it is known that these nano powder possess therapeutic efficacy for numerous diseases.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"43 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-30DOI: 10.15251/djnb.2023.184.1293
H. R. Zhi, H. T. Zhao, Y. F. Zhang, B. Dampilon
The microstructural features and crystallographic texture of 316L stainless steel prepared by direct energy deposition (DED) are studied. The grain size, morphology, grain boundary, misorientation distribution along different direction and mechanical properties are characterized via detailed electron backscatter diffraction (EBSD) analysis and Vickers microhardness tester. The DED-built 316L stainless steel exhibits equiaxed cellular and elongated morphology. Only a few number of dislocations are accumulated and entangled near small grain boundary. The sample contains mainly large angle grain boundary. 316L stainless steel powder is melted to form a deep and shallow shape measured from the top view. The average grain size is 38.32 µm and 29.79 µm for the top and side view, respectively. Two strong textural components of {001}<100> cube texture and {110}<001> Goss texture are formed perpendicular and parallel to the scanning direction, respectively. The microhardness of DED-built 316L stainless steel achieves a higher average value of 261.74 HV.
{"title":"Microstructure and crystallographic texture of direct energy deposition printed 316L stainless steel","authors":"H. R. Zhi, H. T. Zhao, Y. F. Zhang, B. Dampilon","doi":"10.15251/djnb.2023.184.1293","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1293","url":null,"abstract":"The microstructural features and crystallographic texture of 316L stainless steel prepared by direct energy deposition (DED) are studied. The grain size, morphology, grain boundary, misorientation distribution along different direction and mechanical properties are characterized via detailed electron backscatter diffraction (EBSD) analysis and Vickers microhardness tester. The DED-built 316L stainless steel exhibits equiaxed cellular and elongated morphology. Only a few number of dislocations are accumulated and entangled near small grain boundary. The sample contains mainly large angle grain boundary. 316L stainless steel powder is melted to form a deep and shallow shape measured from the top view. The average grain size is 38.32 µm and 29.79 µm for the top and side view, respectively. Two strong textural components of {001}<100> cube texture and {110}<001> Goss texture are formed perpendicular and parallel to the scanning direction, respectively. The microhardness of DED-built 316L stainless steel achieves a higher average value of 261.74 HV.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-30DOI: 10.15251/djnb.2023.184.1275
J. J. Li, Y. F. Zhang, Q. Li, Q. Hao, X.Y. Ran, X. L. Guo
The 8 wt.% yttrium oxide partially stabilized zirconia (8YSZ) coatings were prepared by atmospheric plasma spraying (APS). The microstructure and properties of the coating were analyzed. The results show that the overall morphology of 8YSZ coating is smooth. The XRD pattern shows that the 8YSZ coating don’t undergo phase transformation and has a stable tetragonal phase. 8YSZ thermal barrier coating (TBC) remains intact after 70 thermal cycle tests. The finite element results show that the 8YSZ TBC has good thermal insulation. Potentiodynamic polarization and electrochemical impedance spectroscopy show that the coating has good corrosion resistance.
{"title":"Study on the properties of 8YSZ thermal barrier coatings by atmospheric plasma spraying","authors":"J. J. Li, Y. F. Zhang, Q. Li, Q. Hao, X.Y. Ran, X. L. Guo","doi":"10.15251/djnb.2023.184.1275","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1275","url":null,"abstract":"The 8 wt.% yttrium oxide partially stabilized zirconia (8YSZ) coatings were prepared by atmospheric plasma spraying (APS). The microstructure and properties of the coating were analyzed. The results show that the overall morphology of 8YSZ coating is smooth. The XRD pattern shows that the 8YSZ coating don’t undergo phase transformation and has a stable tetragonal phase. 8YSZ thermal barrier coating (TBC) remains intact after 70 thermal cycle tests. The finite element results show that the 8YSZ TBC has good thermal insulation. Potentiodynamic polarization and electrochemical impedance spectroscopy show that the coating has good corrosion resistance.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"43 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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