The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform

Eugene A. Olevsky - One of the best experts on this subject based on the ideXlab platform.

  • Electric pulse consolidation: An alternative to spark plasma Sintering
    Journal of Materials Science, 2014
    Co-Authors: M. S. Yurlova, V. D. Demenyuk, L. Yu Lebedeva, Dina V. Dudina, E. G. Grigoryev, Eugene A. Olevsky
    Abstract:

    This article includes a comprehensive review of the methods of Sintering of Powder materials based on the use of electric current as a technological tool and presenting alternatives to the spark plasma Sintering technique. The described Sintering methods utilize electric discharges of several kilovolts (as opposed to low-voltage processing employed by spark plasma Sintering), electric current densities exceeding 10 kA cm-2, and pressures of up to 10 GPa. In most cases, the Powder to be consolidated is subjected to a single electric pulse of short duration (shorter than 0.1 s). The general term used to refer to these methods is electric pulse Sintering (EPS). At present, the methods of EPS are rapidly advancing, which stimulates the development of their technical capabilities and equipment. This review provides a description of the facilities used by research groups in different countries. The EPS set-ups vary by the type of electric pulse generator, pressing equipment, geometrical features of the working chambers, die materials, as well as by other elements of design making each set-up unique among similar ones. In the paper, in addition to the practical technological aspects, the main physical processes occurring during EPS are described. The mechanisms of Sintering as well as the influence of Sintering parameters on the quality of the compacts are also discussed. Possibilities of using EPS for the production of high-strength materials, complex composite materials, nanostructured materials, and metal-ceramic composites are shown. © 2013 Springer Science+Business Media New York.

Nikolay K Tolochko - One of the best experts on this subject based on the ideXlab platform.

  • Laser Sintering of Powder SiO2 compacts
    Poroshkovaya Metallurgiya, 2004
    Co-Authors: Nikolay K Tolochko, K. I. Arshinov, Maxim K. Arshinov, A. V. Ragulya
    Abstract:

    The regularities of Sintering compacted SiO2 Powders under a CO2 laser action were experimentally investigated. The peculiarities of Powder body structure reformation (regrouping particles, particle contact formation, joining of particles into conglomerates, porous structure evolution) at different stages of Sintering were studied. The Sintering was carried out with using the liquid-phase mechanism which provided melting the particles and joining their solid nonmelted cores by the formed liquid phase. The results obtained may be used for the further development of methods for laser Sintering of ceramic Powders.

  • Selective laser Sintering of single-phase Powder Cr-V tool steel
    Journal of Materials Engineering and Performance, 2002
    Co-Authors: A. I. Kovalev, V. P. Mishina, D. L. Wainstein, V. I. Titov, V. F. Moiseev, Nikolay K Tolochko
    Abstract:

    Presented is positive experience from selective laser Sintering (SLS) of cylindrical steel specimens (3.0% C, 3.0% Cr, 1.0% Si, 12.0% V, Fe balance) 30 mm long and 5 mm in diameter by rapid prototyping. It was demonstrated that monolithic steel material could be successfully fabricated by this technology. Differential thermal analysis (DTA), scanning electron microscopy (SEM), and x-ray diffractometry (XRD) were used to study the microstructure, phase, and chemical composition of the source material and obtained specimens. Low-melting cementite-based eutectic was found to provide the liquid phase Sintering of Powder tool steel. The porosity of the green sintered specimens did not exceed 5%. The mean hardness value of sintered specimens was 825 HV.

M. S. Yurlova - One of the best experts on this subject based on the ideXlab platform.

  • Electric pulse consolidation: an alternative to spark plasma Sintering
    Journal of Materials Science, 2014
    Co-Authors: M. S. Yurlova, V. D. Demenyuk, L. Yu Lebedeva, Dina V. Dudina, E. G. Grigoryev, E. Olevsky
    Abstract:

    This article includes a comprehensive review of the methods of Sintering of Powder materials based on the use of electric current as a technological tool and presenting alternatives to the spark plasma Sintering technique. The described Sintering methods utilize electric discharges of several kilovolts (as opposed to low-voltage processing employed by spark plasma Sintering), electric current densities exceeding 10 kA cm^−2, and pressures of up to 10 GPa. In most cases, the Powder to be consolidated is subjected to a single electric pulse of short duration (shorter than 0.1 s). The general term used to refer to these methods is electric pulse Sintering (EPS). At present, the methods of EPS are rapidly advancing, which stimulates the development of their technical capabilities and equipment. This review provides a description of the facilities used by research groups in different countries. The EPS set-ups vary by the type of electric pulse generator, pressing equipment, geometrical features of the working chambers, die materials, as well as by other elements of design making each set-up unique among similar ones. In the paper, in addition to the practical technological aspects, the main physical processes occurring during EPS are described. The mechanisms of Sintering as well as the influence of Sintering parameters on the quality of the compacts are also discussed. Possibilities of using EPS for the production of high-strength materials, complex composite materials, nanostructured materials, and metal–ceramic composites are shown.

  • Electric pulse consolidation: An alternative to spark plasma Sintering
    Journal of Materials Science, 2014
    Co-Authors: M. S. Yurlova, V. D. Demenyuk, L. Yu Lebedeva, Dina V. Dudina, E. G. Grigoryev, Eugene A. Olevsky
    Abstract:

    This article includes a comprehensive review of the methods of Sintering of Powder materials based on the use of electric current as a technological tool and presenting alternatives to the spark plasma Sintering technique. The described Sintering methods utilize electric discharges of several kilovolts (as opposed to low-voltage processing employed by spark plasma Sintering), electric current densities exceeding 10 kA cm-2, and pressures of up to 10 GPa. In most cases, the Powder to be consolidated is subjected to a single electric pulse of short duration (shorter than 0.1 s). The general term used to refer to these methods is electric pulse Sintering (EPS). At present, the methods of EPS are rapidly advancing, which stimulates the development of their technical capabilities and equipment. This review provides a description of the facilities used by research groups in different countries. The EPS set-ups vary by the type of electric pulse generator, pressing equipment, geometrical features of the working chambers, die materials, as well as by other elements of design making each set-up unique among similar ones. In the paper, in addition to the practical technological aspects, the main physical processes occurring during EPS are described. The mechanisms of Sintering as well as the influence of Sintering parameters on the quality of the compacts are also discussed. Possibilities of using EPS for the production of high-strength materials, complex composite materials, nanostructured materials, and metal-ceramic composites are shown. © 2013 Springer Science+Business Media New York.

A. I. Kovalev - One of the best experts on this subject based on the ideXlab platform.

  • Selective laser Sintering of single-phase Powder Cr-V tool steel
    Journal of Materials Engineering and Performance, 2002
    Co-Authors: A. I. Kovalev, V. P. Mishina, D. L. Wainstein, V. I. Titov, V. F. Moiseev, Nikolay K Tolochko
    Abstract:

    Presented is positive experience from selective laser Sintering (SLS) of cylindrical steel specimens (3.0% C, 3.0% Cr, 1.0% Si, 12.0% V, Fe balance) 30 mm long and 5 mm in diameter by rapid prototyping. It was demonstrated that monolithic steel material could be successfully fabricated by this technology. Differential thermal analysis (DTA), scanning electron microscopy (SEM), and x-ray diffractometry (XRD) were used to study the microstructure, phase, and chemical composition of the source material and obtained specimens. Low-melting cementite-based eutectic was found to provide the liquid phase Sintering of Powder tool steel. The porosity of the green sintered specimens did not exceed 5%. The mean hardness value of sintered specimens was 825 HV.

Dina V. Dudina - One of the best experts on this subject based on the ideXlab platform.

  • Electric pulse consolidation: an alternative to spark plasma Sintering
    Journal of Materials Science, 2014
    Co-Authors: M. S. Yurlova, V. D. Demenyuk, L. Yu Lebedeva, Dina V. Dudina, E. G. Grigoryev, E. Olevsky
    Abstract:

    This article includes a comprehensive review of the methods of Sintering of Powder materials based on the use of electric current as a technological tool and presenting alternatives to the spark plasma Sintering technique. The described Sintering methods utilize electric discharges of several kilovolts (as opposed to low-voltage processing employed by spark plasma Sintering), electric current densities exceeding 10 kA cm^−2, and pressures of up to 10 GPa. In most cases, the Powder to be consolidated is subjected to a single electric pulse of short duration (shorter than 0.1 s). The general term used to refer to these methods is electric pulse Sintering (EPS). At present, the methods of EPS are rapidly advancing, which stimulates the development of their technical capabilities and equipment. This review provides a description of the facilities used by research groups in different countries. The EPS set-ups vary by the type of electric pulse generator, pressing equipment, geometrical features of the working chambers, die materials, as well as by other elements of design making each set-up unique among similar ones. In the paper, in addition to the practical technological aspects, the main physical processes occurring during EPS are described. The mechanisms of Sintering as well as the influence of Sintering parameters on the quality of the compacts are also discussed. Possibilities of using EPS for the production of high-strength materials, complex composite materials, nanostructured materials, and metal–ceramic composites are shown.

  • Electric pulse consolidation: An alternative to spark plasma Sintering
    Journal of Materials Science, 2014
    Co-Authors: M. S. Yurlova, V. D. Demenyuk, L. Yu Lebedeva, Dina V. Dudina, E. G. Grigoryev, Eugene A. Olevsky
    Abstract:

    This article includes a comprehensive review of the methods of Sintering of Powder materials based on the use of electric current as a technological tool and presenting alternatives to the spark plasma Sintering technique. The described Sintering methods utilize electric discharges of several kilovolts (as opposed to low-voltage processing employed by spark plasma Sintering), electric current densities exceeding 10 kA cm-2, and pressures of up to 10 GPa. In most cases, the Powder to be consolidated is subjected to a single electric pulse of short duration (shorter than 0.1 s). The general term used to refer to these methods is electric pulse Sintering (EPS). At present, the methods of EPS are rapidly advancing, which stimulates the development of their technical capabilities and equipment. This review provides a description of the facilities used by research groups in different countries. The EPS set-ups vary by the type of electric pulse generator, pressing equipment, geometrical features of the working chambers, die materials, as well as by other elements of design making each set-up unique among similar ones. In the paper, in addition to the practical technological aspects, the main physical processes occurring during EPS are described. The mechanisms of Sintering as well as the influence of Sintering parameters on the quality of the compacts are also discussed. Possibilities of using EPS for the production of high-strength materials, complex composite materials, nanostructured materials, and metal-ceramic composites are shown. © 2013 Springer Science+Business Media New York.