Sintering kinetics of porous fiber solids

Косторнов, А. Г.; Galstyan, L. G.

doi:10.1007/bf00792265

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The summary of uniaxial tensile properties for the WMPPs is shown in Table 2 . From the Ultimate Tensile Strength column, we can see that even the lowest value (140 MPa), which belonged to the sample with 32.5% porosity and sintered at 1230 °C for 2 h, is much higher than that of other porous materials, such as foamed aluminum, foamed nickel, sintered metal powder materials, and sintered metal fiber materials with the same porosity [ 4 , 5 , 7 , 8 ]. In my opinion, the advantageous performance of the WMPPs is due to the continuous wires (the pore skeletons) and the inerratic pore structure.…”

Section: Resultsmentioning

confidence: 99%

“…For examples, Fei Xu and his companions [ 7 ] investigated the tensile behaviors of sintering stainless steel powder porous materials and discovered that when the porosity is raised from 22.1% to 40%, the tensile strength decrease from 150 MPa to 45 MPa; when the sintering temperature decreased from 1200 °C to 1150 °C, the tensile strength decrease from 150 MPa to 125 MPa. Russian professor Kostornov investigated the tensile properties at room temperature and at high temperature for the sintering metal fiber porous materials [ 8 ]. The results indicated that elongation decreases with the increase in porosity and that the tensile strength at room temperature is much higher than the tensile strength at high temperature.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication, Structural Characterization and Uniaxial Tensile Properties of Novel Sintered Multi-Layer Wire Mesh Porous Plates

2018

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There is an increasing interest in developing porous metals or metallic foams for functional and structural applications. The study of the physical and mechanical properties of porous metals is very important and helpful for their application. In this paper, a novel sintered multilayer wire mesh porous plate material (WMPPs) with a thickness of 0.5 mm–3 mm and a porosity of 10–35% was prepared by winding, pressing, rolling, and subsequently vacuum sintering them. The pore size and total size distribution in the as-prepared samples were investigated using the bubble point method. The uniaxial tensile behavior of the WMPPs was investigated in terms of the sintering temperature, porosity, wire diameter, and manufacturing technology. The deformation process and the failure mechanism under the tensile press was also discussed based on the appearance of the fractures (SEM figures). The results indicated that the pore size and total size distribution were closely related to the raw material used and the sintering temperature. For the WMPPs prepared by the wire mesh, the pore structures were inerratic and the vast majority of pore size was less than 10 μm. On the other hand, for the WMPPs that were prepared by wire mesh and powder, the pore structures were irregular and the pore size ranged from 0 μm–50 μm. The experimental data showed that the tensile strength of WMPPs is much higher than any other porous metals or metallic foams. Higher sintering temperatures led to coarser joints between wires and resulted in higher tensile strength. The sintering temperature decreased from 1330 °C to 1130 °C and the tensile strength decreased from 296 MPa to 164 MPa. Lower porosity means that there are more metallurgical joints and metallic frameworks resisting deformation per unit volume. Therefore, lower porosities exhibit higher tensile strength. An increase of porosity from 17.14% to 32.5% led to the decrease of the tensile strength by 90 MPa. The coarser wires led to a bigger contact area between the interconnecting wires, resulting in a stronger sintering neck that exhibited higher tensile strength. The wire diameter increased from 81 μm to 122 μm and the tensile strength increased from 296 MPa to 362 MPa. The fracture morphology showed that the wires experience necking deformation and ductile fracture.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication, Structural Characterization and Uniaxial Tensile Properties of Novel Sintered Multi-Layer Wire Mesh Porous Plates

2018

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Study on Sintering Mechanism of Stainless Steel Fiber Felts by X-ray Computed Tomography

Tang

2016

Metals

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Abstract:The microstructure evolution of Fe-17 wt. % Cr-12 wt. % Ni-2 wt. % Mo stainless steel fiber felts during the fast sintering process was investigated by the synchrotron radiation X-ray computed tomography technique. The equation of dynamics of stable inter-fiber neck growth was established for the first time based on the geometry model of sintering joints of two fibers and Kucsynski's two-sphere model. The specific evolutions of different kinds of sintering joints were observed in the three-dimensional images. The sintering mechanisms during sintering were proposed as plastic flow and grain boundary diffusion, the former leading to a quick growth of sintering joints.

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Sintering kinetics of porous fiber solids

Cited by 2 publications

References 9 publications

Fabrication, Structural Characterization and Uniaxial Tensile Properties of Novel Sintered Multi-Layer Wire Mesh Porous Plates

Fabrication, Structural Characterization and Uniaxial Tensile Properties of Novel Sintered Multi-Layer Wire Mesh Porous Plates

Study on Sintering Mechanism of Stainless Steel Fiber Felts by X-ray Computed Tomography

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