Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2019-4-36-45
P. Maryin, N. Ivanova, E. Shesterikov, E. Bolbasov, S. Tverdokhlebov, Radioelectronics
{"title":"Effect of the target intermediate ion cleaning on the structure of bioresorbable PLLA scaffolds under the coating deposition by DC reactive magnetron sputtering method","authors":"P. Maryin, N. Ivanova, E. Shesterikov, E. Bolbasov, S. Tverdokhlebov, Radioelectronics","doi":"10.30791/0015-3214-2019-4-36-45","DOIUrl":"https://doi.org/10.30791/0015-3214-2019-4-36-45","url":null,"abstract":"","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122821557","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2021-5-49-59
V. Burtsev, E. Chabina
The deoxidation of complex alloyed nickel-based alloys during melting in vacuum is carried out in the presence of aluminum with strong deoxidizers B and Hf, which requires additional knowledge about the activity of dissolved oxygen. For this, the activity was investigated in model melts Ni – O – (B/Hf, 0.001 – 0.1 wt. % of each) and Ni – O – Al (5 %) – (B/Hf, 0.001 – 0.1 wt. % of each) at 1560 °C and РAr = 0.1 MPa by the method of instantaneous EMF recording using certified sensors. It was shown that a[O] with the introduction of B into the melt without aluminum is 1.3 times less than with the introduction of Hf, and for melts with aluminum, a[O] decreased 1.6 times as compared with Hf. The study of the morphology and composition of non-metallic inclusions of the Ni – O – (B/Hf) systems showed that the inclusions are located along grain boundaries, have various complex configurations and sizes from 2 to 100 μm. These phases contain Ni, Fe, Zr, S, O, as well as Hf, Pb, Bi, Si, Mg after deoxidation of Hf and an increased content of Zr after deoxidation of B.
复合合金镍基合金在真空熔融过程中的脱氧是在铝和强脱氧剂B和Hf存在下进行的，这需要对溶解氧的活性有额外的了解。为此，在模型熔体中研究了Ni - O - (B/Hf, 0.001 - 0.1 wt. %)和Ni - O - Al (5%) - (B/Hf, 0.001 - 0.1 wt. %)的活度。在1560°C和РAr = 0.1 MPa下，通过使用经过认证的传感器进行瞬时EMF记录的方法。结果表明，在不含铝的熔体中，引入B的a[O]比引入Hf的a[O]少1.3倍，而在含铝的熔体中，a[O]比引入Hf的a[O]减少1.6倍。对Ni - O - (B/Hf)体系中非金属夹杂物的形貌和组成进行了研究，结果表明:Ni - O - (B/Hf)体系中非金属夹杂物沿晶界分布，具有2 ~ 100 μm的复杂形态和尺寸;这些相中含有Ni、Fe、Zr、S、O，以及Hf脱氧后的Hf、Pb、Bi、Si、Mg, B脱氧后的Zr含量增加。
{"title":"Interaction of B and Hf with oxygen in a nickel melt at РAr = 0.1 MPa and analysis of nonmetallic inclusions","authors":"V. Burtsev, E. Chabina","doi":"10.30791/0015-3214-2021-5-49-59","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-5-49-59","url":null,"abstract":"The deoxidation of complex alloyed nickel-based alloys during melting in vacuum is carried out in the presence of aluminum with strong deoxidizers B and Hf, which requires additional knowledge about the activity of dissolved oxygen. For this, the activity was investigated in model melts Ni – O – (B/Hf, 0.001 – 0.1 wt. % of each) and Ni – O – Al (5 %) – (B/Hf, 0.001 – 0.1 wt. % of each) at 1560 °C and РAr = 0.1 MPa by the method of instantaneous EMF recording using certified sensors. It was shown that a[O] with the introduction of B into the melt without aluminum is 1.3 times less than with the introduction of Hf, and for melts with aluminum, a[O] decreased 1.6 times as compared with Hf. The study of the morphology and composition of non-metallic inclusions of the Ni – O – (B/Hf) systems showed that the inclusions are located along grain boundaries, have various complex configurations and sizes from 2 to 100 μm. These phases contain Ni, Fe, Zr, S, O, as well as Hf, Pb, Bi, Si, Mg after deoxidation of Hf and an increased content of Zr after deoxidation of B.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125741955","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2021-2-63-71
S. Ovsepyan, Fsue “Viam”, Y. Kolobov, M. V. Akhmedzyanov, S. Manokhin, E. Filonova, I. Ras
In a high-temperature alloy of the Ni – Co – Cr – W – Ti system grade VZh171, using X-ray spectral analysis, scanning and transmission electron microscopy, the composition of the particles of the hardening phase — nitrides after internal nitriding and subsequent heat treatment was studied. It was found that the particles differ on it chemical composition: the main constituent element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases. It was found that the nitrides formed during nitriding are compounds in which the main forming element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases.
在Ni - Co - Cr - W - Ti体系牌号VZh171高温合金中，采用x射线光谱分析、扫描电镜和透射电镜研究了内渗和热处理后硬化相氮化物颗粒的组成。结果发现，颗粒的化学成分不同:主要成分钛或铬按比例被其他合金成分所取代。在钛铬比中，样品表面附近和中心的氮化物组成不同。退火后，这种差异变小，铬含量也降低。结果表明，在氮化过程中形成的氮化物是主要形成元素钛或铬按比例被其他合金成分取代的化合物。在钛铬比中，样品表面附近和中心的氮化物组成不同。退火后，这种差异变小，铬含量也降低。
{"title":"Investigation of the nitride phase in a heat-resistant alloy of the Ni – Co – W – Ti system, hardened by internal nitration","authors":"S. Ovsepyan, Fsue “Viam”, Y. Kolobov, M. V. Akhmedzyanov, S. Manokhin, E. Filonova, I. Ras","doi":"10.30791/0015-3214-2021-2-63-71","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-2-63-71","url":null,"abstract":"In a high-temperature alloy of the Ni – Co – Cr – W – Ti system grade VZh171, using X-ray spectral analysis, scanning and transmission electron microscopy, the composition of the particles of the hardening phase — nitrides after internal nitriding and subsequent heat treatment was studied. It was found that the particles differ on it chemical composition: the main constituent element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases. It was found that the nitrides formed during nitriding are compounds in which the main forming element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122852287","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2019-6-22-27
A. Grebennikov, A. I. Bocharov, S. B. Kushchev, D. Serikov, A. B. Kostyuchenko, E. Fedorova, I. V. Izvekova, I. Safonov, Military Educational
{"title":"Effect of pulsed photon treatment on electrophysical and thermal properties of n-type solid solution on the base of Bi2Te3-Bi2Se3. II. Thermal conductivity and thermoelectric figure of merit","authors":"A. Grebennikov, A. I. Bocharov, S. B. Kushchev, D. Serikov, A. B. Kostyuchenko, E. Fedorova, I. V. Izvekova, I. Safonov, Military Educational","doi":"10.30791/0015-3214-2019-6-22-27","DOIUrl":"https://doi.org/10.30791/0015-3214-2019-6-22-27","url":null,"abstract":"","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122445903","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2020-6-69-74
V. Kudinov, I. Krylov, N. Korneeva
The low-velosity impact properties and failure mechanisms of ultra-high molecular weight polyethylene (UHMWPE) fiber (Dyneema®SK-75) and a composite material (CM) based on it with the rigid and flexible matrices were investigated by the “Impact Break” (IB) method. A fundamental difference in deformation behavior and failure mechanisms upon impact on the UHMWPE-fiber and on the CM based on this fiber has been investigated experimentally. It is shown that impact has a little effect on the properties of UHMWPE-fiber, since it is an isotropic material. It has been established that upon impact, the properties of a fiber without a matrix were significantly higher than the properties of CM based on it. Impact action stimulates the interaction between CM components (fibers and matrix). Mechanism of stepwise deformation of anisotropic CM is occurred, which begins from the first moment of impact and ends with the destruction of the CM. A “stairway of deformation” behavior is observed in anisotropic materials. Stepwise deformation is the main form of deformation and the basic mechanism of failure of anisotropic composite materials upon impact.
{"title":"Impact action on fiber and composite material based on it","authors":"V. Kudinov, I. Krylov, N. Korneeva","doi":"10.30791/0015-3214-2020-6-69-74","DOIUrl":"https://doi.org/10.30791/0015-3214-2020-6-69-74","url":null,"abstract":"The low-velosity impact properties and failure mechanisms of ultra-high molecular weight polyethylene (UHMWPE) fiber (Dyneema®SK-75) and a composite material (CM) based on it with the rigid and flexible matrices were investigated by the “Impact Break” (IB) method. A fundamental difference in deformation behavior and failure mechanisms upon impact on the UHMWPE-fiber and on the CM based on this fiber has been investigated experimentally. It is shown that impact has a little effect on the properties of UHMWPE-fiber, since it is an isotropic material. It has been established that upon impact, the properties of a fiber without a matrix were significantly higher than the properties of CM based on it. Impact action stimulates the interaction between CM components (fibers and matrix). Mechanism of stepwise deformation of anisotropic CM is occurred, which begins from the first moment of impact and ends with the destruction of the CM. A “stairway of deformation” behavior is observed in anisotropic materials. Stepwise deformation is the main form of deformation and the basic mechanism of failure of anisotropic composite materials upon impact.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116766532","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2019-2-5-13
O. Laput, I. Kurzina, I. Vasenina
{"title":"Effect of Ag2+ and C+ ion implantation on the surface physicochemical properties of polylactic acid, hydroxyapatite and composite materials based on them","authors":"O. Laput, I. Kurzina, I. Vasenina","doi":"10.30791/0015-3214-2019-2-5-13","DOIUrl":"https://doi.org/10.30791/0015-3214-2019-2-5-13","url":null,"abstract":"","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126909749","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-2-13-22
A. M. Kruchinin, M. Pogrebisskiy, E. Ryazanova, A. Chursin
The method of universal arc characteristics developed for calculating the electrical and thermal characteristics of the cylindrical part of the Mecker model column allows simple algebraic methods to calculate the characteristics of the arc column at a distance from the cathode and, thereby, to concretize the mathematical model of Mecker. The proven conservativeness of the arc as a result of the formation of a spatial layer with increased volumetric viscosity on the surface of the column allows, in accordance with the provisions of the boundary layer theory, to apply a boundary condition of the third kind to the surface of the cylindrical part of the arc column. The method of universal arc characteristics also helps to link the boundary value of the linear heat flux density on the surface of the cylindrical part of the column with the temperature profile of the column and, thereby, to specify the dependence of the electrical, geometric and thermal characteristics of the column plasma on the conditions of arc heat exchange in the working space of the installation with electric arc heating. The proposed method makes it possible, based only on the external voltage characteristics of the arc, to identify the Mecker heat exchange model and calculate by a simple algebraic method the structure and values of the heat fluxes generated by the arc during heat exchange with the plasma torch gas jet in the melting space of the plasma arc furnace. Examples of arc characteristics are given when working on different gases for different stages of melting — at the beginning of melting and during the melting of the charge.
{"title":"Calculation of rational modes of plasma torches for plasma arc furnaces","authors":"A. M. Kruchinin, M. Pogrebisskiy, E. Ryazanova, A. Chursin","doi":"10.30791/0015-3214-2022-2-13-22","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-2-13-22","url":null,"abstract":"The method of universal arc characteristics developed for calculating the electrical and thermal characteristics of the cylindrical part of the Mecker model column allows simple algebraic methods to calculate the characteristics of the arc column at a distance from the cathode and, thereby, to concretize the mathematical model of Mecker. The proven conservativeness of the arc as a result of the formation of a spatial layer with increased volumetric viscosity on the surface of the column allows, in accordance with the provisions of the boundary layer theory, to apply a boundary condition of the third kind to the surface of the cylindrical part of the arc column. The method of universal arc characteristics also helps to link the boundary value of the linear heat flux density on the surface of the cylindrical part of the column with the temperature profile of the column and, thereby, to specify the dependence of the electrical, geometric and thermal characteristics of the column plasma on the conditions of arc heat exchange in the working space of the installation with electric arc heating. The proposed method makes it possible, based only on the external voltage characteristics of the arc, to identify the Mecker heat exchange model and calculate by a simple algebraic method the structure and values of the heat fluxes generated by the arc during heat exchange with the plasma torch gas jet in the melting space of the plasma arc furnace. Examples of arc characteristics are given when working on different gases for different stages of melting — at the beginning of melting and during the melting of the charge.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124420227","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-6-26-32
T. Obolkina, M. Goldberg, S. Smirnov, O. Antonova, D. A. Utkin, D. Khairutdinova, A. Konovalov, G. Kochanov, S. Barinov, V. Komlev
In this article, we studied the influence of Mn2+ on the properties (on the phase composition, porosity, microstructure, three-point bending strength and microhardness) and sintering of the ZrO2 – Al2O3 – SiO2 composite ceramic materials. The ZrO2 – Al2O3 – SiO2 ceramic powder containing 2,5 wt.% Al2O3 and 0,5 wt.% SiO2 with 24,7 m2/g specific area was synthesized through co-precipitation method. Three concentrations of Mn2+ are considered: 0.25, 0.50 and 0.75 mol%. The introduction of Mn2+ leads to a significant increase in mechanical properties. The samples sintered at 1250 and 1300 °C for 2 hours. The highest value of strength at three-point bending 761 ± 36 MPa and microhardness 9.5 ± 0.5 GPa was characterized by the material of the composition ZrO2 – Al2O3 – SiO2 containing 0.75 mol.% Mn2+ sintered at 1300 °С. The crack resistance of this material was 7.0 MPa·m1/2. At the same time, the highest values of crack resistance 9.3 ± 0.5 MPa·m1/2 were shown by materials of the composition ZrO2 – Al2O3 – SiO2 containing 0.75 mol. % Mn2+ sintered at 1250 °C.
{"title":"The effect of Mn2+ on the microstructure and mechanical properties of ZrO2 – Al2O3 – SiO2 ceramic materials","authors":"T. Obolkina, M. Goldberg, S. Smirnov, O. Antonova, D. A. Utkin, D. Khairutdinova, A. Konovalov, G. Kochanov, S. Barinov, V. Komlev","doi":"10.30791/0015-3214-2022-6-26-32","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-6-26-32","url":null,"abstract":"In this article, we studied the influence of Mn2+ on the properties (on the phase composition, porosity, microstructure, three-point bending strength and microhardness) and sintering of the ZrO2 – Al2O3 – SiO2 composite ceramic materials. The ZrO2 – Al2O3 – SiO2 ceramic powder containing 2,5 wt.% Al2O3 and 0,5 wt.% SiO2 with 24,7 m2/g specific area was synthesized through co-precipitation method. Three concentrations of Mn2+ are considered: 0.25, 0.50 and 0.75 mol%. The introduction of Mn2+ leads to a significant increase in mechanical properties. The samples sintered at 1250 and 1300 °C for 2 hours. The highest value of strength at three-point bending 761 ± 36 MPa and microhardness 9.5 ± 0.5 GPa was characterized by the material of the composition ZrO2 – Al2O3 – SiO2 containing 0.75 mol.% Mn2+ sintered at 1300 °С. The crack resistance of this material was 7.0 MPa·m1/2. At the same time, the highest values of crack resistance 9.3 ± 0.5 MPa·m1/2 were shown by materials of the composition ZrO2 – Al2O3 – SiO2 containing 0.75 mol. % Mn2+ sintered at 1250 °C.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121491541","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-6-5-10
A. Ligachev, M. Zhidkov, Y. Kolobov, G. Potemkin, M. V. Lukahova, G. Remnev, S. Pavlov, G. E. Tarbokov
The tungsten surface was processed by high power pulsed ion beam at the TEMP accelerator (Cn+ ions, accelerating voltage 200 ± 10 kV, energy density of a single pulse 2.6 – 3.0 J/cm2). Changes in the relief and structure of the surface of tungsten samples were studied by scanning electron microscopy. After treatment with a powerful pulsed ion beam (MIIP), defects in the form of craters form on the surface of tungsten. The number of craters decreases with an increase in the number of impact pulses. After exposure to 3 pulses, microcraters are forms in the surface layer along the grain boundaries. After 10 pulses, there are practically no cracks on the irradiated surface. An increase in the number of pulses leads to the formation of a more equiaxed ultrafine-grained structure in the near-surface layer of tungsten.
{"title":"The effect of a high-power pulsed ion beam on the surface topography of the tungsten","authors":"A. Ligachev, M. Zhidkov, Y. Kolobov, G. Potemkin, M. V. Lukahova, G. Remnev, S. Pavlov, G. E. Tarbokov","doi":"10.30791/0015-3214-2022-6-5-10","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-6-5-10","url":null,"abstract":"The tungsten surface was processed by high power pulsed ion beam at the TEMP accelerator (Cn+ ions, accelerating voltage 200 ± 10 kV, energy density of a single pulse 2.6 – 3.0 J/cm2). Changes in the relief and structure of the surface of tungsten samples were studied by scanning electron microscopy. After treatment with a powerful pulsed ion beam (MIIP), defects in the form of craters form on the surface of tungsten. The number of craters decreases with an increase in the number of impact pulses. After exposure to 3 pulses, microcraters are forms in the surface layer along the grain boundaries. After 10 pulses, there are practically no cracks on the irradiated surface. An increase in the number of pulses leads to the formation of a more equiaxed ultrafine-grained structure in the near-surface layer of tungsten.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121520893","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-3-54-66
M. Gryaznov, A. Samokhin, V. Chuvildeev, A. Fadeev, N. Alekseev, S. Shotin, A. A. Dorofeev
The powder of 93 W – 4.9 Ni – 2.1 Fe (VNZh-93) pseudo-alloy with a spherical particle shape in the size range of 15 – 50 μm with a grain size of 0.5 – 3 μm was obtained using plasma chemical synthesis, granulation and spheroidization technologies. The possibility of using spheroidized powder VNZh-93 in additive 3D-printing is demonstrated. Studies of the physical and mechanical characteristics and microstructure of VNZh-93 test samples made using the selective laser melting technology (SLM) have been carried out. It is shown that the parameters of the SLM significantly affect the formation of the microstructure of test samples. It is possible to form a homogeneous equiaxed microstructure with an average grain size of about 1 micron using optimal SLM modes. It is shown that maximum density and Vickers hardness of VNZh-93 obtained in optimal SLM modes are 16.8 g/cm3 and 480 HV, respectively. These values are not inferior to the values for VNZh-93 samples obtained using traditional liquid-phase sintering technology. At the same time, the main problem of selective laser melting of VNZh-93 powder is the heterogeneity of the bulk samples microstructure and the formation of microcracks and micropores in their structure.
采用等离子体化学合成、造粒和球化技术制备了93 W - 4.9 Ni - 2.1 Fe (VNZh-93)伪合金粉末，粉末尺寸为15 ~ 50 μm，晶粒尺寸为0.5 ~ 3 μm。论证了球化粉末VNZh-93用于增材3d打印的可能性。采用选择性激光熔化技术(SLM)对VNZh-93试样的物理力学特性和显微组织进行了研究。结果表明，SLM的参数对试样微观结构的形成有显著影响。利用最佳SLM模式可以形成平均晶粒尺寸约为1微米的均匀等轴微观结构。结果表明，在最佳SLM模式下，VNZh-93的最大密度和维氏硬度分别为16.8 g/cm3和480 HV。这些值不低于用传统液相烧结技术得到的VNZh-93样品的值。同时，VNZh-93粉末选择性激光熔化的主要问题是试样组织的不均匀性和组织中微裂纹和微孔的形成。
{"title":"Obtaining composite 93 W – 4.9 Ni – 2.1 Fe powder with a spherical particle and investigating the possibility of its use in selective laser melting","authors":"M. Gryaznov, A. Samokhin, V. Chuvildeev, A. Fadeev, N. Alekseev, S. Shotin, A. A. Dorofeev","doi":"10.30791/0015-3214-2022-3-54-66","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-3-54-66","url":null,"abstract":"The powder of 93 W – 4.9 Ni – 2.1 Fe (VNZh-93) pseudo-alloy with a spherical particle shape in the size range of 15 – 50 μm with a grain size of 0.5 – 3 μm was obtained using plasma chemical synthesis, granulation and spheroidization technologies. The possibility of using spheroidized powder VNZh-93 in additive 3D-printing is demonstrated. Studies of the physical and mechanical characteristics and microstructure of VNZh-93 test samples made using the selective laser melting technology (SLM) have been carried out. It is shown that the parameters of the SLM significantly affect the formation of the microstructure of test samples. It is possible to form a homogeneous equiaxed microstructure with an average grain size of about 1 micron using optimal SLM modes. It is shown that maximum density and Vickers hardness of VNZh-93 obtained in optimal SLM modes are 16.8 g/cm3 and 480 HV, respectively. These values are not inferior to the values for VNZh-93 samples obtained using traditional liquid-phase sintering technology. At the same time, the main problem of selective laser melting of VNZh-93 powder is the heterogeneity of the bulk samples microstructure and the formation of microcracks and micropores in their structure.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121530324","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}
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