X-ray diffraction layer-by-layer analysis of tungsten carbide-based hard alloys

2020 ◽  
Vol 86 (8) ◽  
pp. 38-42
Author(s):  
K. E. Smetanina ◽  
P. V. Andreev ◽  
E. A. Lantsev ◽  
M. M. Vostokov ◽  
N. V. Malekhonova
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Spark Plasma Sintering ◽  
Physical And Mechanical Properties ◽  
Hard Alloys ◽  
Layer By Layer ◽  
X Ray ◽  
Novel Technologies ◽  
Plasma Sintering ◽  
Spark Plasma

Improvement of the physical and mechanical properties of hard alloys based on WC – Co widely used in manufacturing of structural and tool products nowadays results from the use of novel technologies providing formation of a homogeneous high-density structures. Slight deviations of the carbon content from the equilibrium state lead to the formation of brittle η-phases (in particular, Co3W3C) and, accordingly, to deterioration of the mechanical properties of the product. We present the results of studying the homogeneity of the phase composition of the samples of hard alloys WC + 10% Co, obtained using advanced technologies of plasma-chemical synthesis and spark plasma sintering (SPS). The layer-by-layer X-ray phase analysis revealed the heterogeneity of the phase composition in depth: the brittle η-phase (Co3W3C) appears at a depth of ≥100 μm and reaches a constant value of 18 ± 1 wt.% at >200 μm, which indirectly confirms the hypothesis of carbon diffusion from graphite punches contacting with the surface of sintered samples and makes it possible to expand the range of parameters affecting the process of spark plasma sintering.

Spark Plasma Sintering of Paper-Derived Ti3AlC2-Based Composites: Influence of Sintering Temperature

2021 ◽  
Vol 1016 ◽  
pp. 1790-1796
Author(s):  
Maxim Syrtanov ◽  
Egor Kashkarov ◽  
Tatyana Murashkina ◽  
Nahum Travitzky
Keyword(s):  
Phase Composition ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Total Content ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbide Phases ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Scanning Electron

This paper describes the influence of sintering temperature on phase composition and microstructure of paper-derived Ti3AlC2 composites fabricated by spark plasma sintering. The composites were sintered at 100 MPa pressure in the temperature range of 1150-1350 °C. Phase composition and microstructure were analyzed by X-ray diffraction and scanning electron microscopy, respectively. The multiphase structure was observed in the sintered composites consisting of Ti3AlC2, Ti2AlC, TiC and Al2O3 phases. The decomposition of the Ti3AlC2 phase into Ti2AlC and TiC carbide phases was observed with temperature rise. The total content of Ti3AlC2 and Ti2AlC phases was reduced from 84.5 vol.% (1150 °C) to 69.5 vol.% (1350 °C). The density of composites affected by both the content of TiC phase and changes in porosity.

Microstructures and Mechanical Properties of Ti-43Al-5V-4Nb-Y Alloy Consolidated by Spark Plasma Sintering

2016 ◽  
Vol 704 ◽  
pp. 183-189
Author(s):  
Yong Jun Su ◽  
Yi Feng Zheng ◽  
De Liang Zhang ◽  
Fan Tao Kong
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Tial Alloy ◽  
Tensile Tests ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasma Sintering ◽  
Short Period ◽  
Spark Plasma ◽  
Fully Lamellar

TiAl alloy with a composition of Ti-43Al-5V-4Nb-Y (at.%) was prepared by spark plasma sintering (SPS). The TiAl powders were sintered between 650°C and 1300°C for 5 min under different loads. With the increasing of the temperature, the diffusion of the elements can be observed. Full compaction is achieved in a short period of time and the overall processing duration does not exceed 30 min. A fully lamellar structure was seen in the TiAl alloy after heat treatment. The microstructures of the samples were determined by X-ray diffraction and scanning electron microscopy. Their mechanical properties were evaluated by tensile tests performed at room temperature

scholarly journals Physical and Mechanical Properties of Graphene Nanoplatelet-Reinforced Al6061-T6 Composites Processed by Spark Plasma Sintering

JOM ◽  
2020 ◽  
Vol 72 (6) ◽  
pp. 2295-2304
Author(s):  
Mahmood Khan ◽  
Rafi Ud-Din ◽  
Abdul Wadood ◽  
Syed Wilayat Husain ◽  
Shahid Akhtar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Physical And Mechanical Properties ◽  
Graphene Nanoplatelet ◽  
Plasma Sintering ◽  
Spark Plasma

TiCN-Based Cermets Strengthened with SiC Nano-Whiskers by Spark Plasma Sintering

2012 ◽  
Vol 512-515 ◽  
pp. 932-935
Author(s):  
Ying Peng ◽  
Zhi Jian Peng ◽  
Xiao Yong Ren ◽  
Hui Yong Rong ◽  
Cheng Biao Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Flexural Strength ◽  
Spark Plasma Sintering ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Addition Amount ◽  
Scanning Electron

TiCN-based cermets with different amounts of SiC nano-whiskers were prepared by spark plasma sintering. The microstructure and mechanical properties of the as-prepared cermets were investigated. X-ray diffraction revealed that there were no SiC peaks detected, turning out some peaks of new carbide and silicate hard phases. Scanning electron microscopy indicated that there were more and more pores in the cermets with increasing amount of SiC whisker added, and the fracture mechanism of the cermets was mainly inter-granular fracture. With increasing addition amount of nano-SiC whisker, the hardness and flexural strength of the cermets increased first and decreased then, presenting the highest hardness (2170 HV) and flexural strength (750 MPa), respectively, when the addition content of nano-whiskers is 2.5 wt%.

scholarly journals Preceramic Paper-Derived SiCf/SiCp Composites Obtained by Spark Plasma Sintering: Processing, Microstructure and Mechanical Properties

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 607 ◽  
Author(s):  
Li ◽  
Kashkarov ◽  
Syrtanov ◽  
Sedanova ◽  
Ivashutenko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Physical And Mechanical Properties ◽  
Ceramic Matrix Composites ◽  
Processing Parameters ◽  
Matrix Composites ◽  
Sic Fibers ◽  
Plasma Sintering ◽  
The Matrix ◽  
Spark Plasma

Ceramic matrix composites (CMCs) based on silicon carbide (SiC) are promising materials for applications as structural components used under high irradiation flux and high temperature conditions. The addition of SiC fibers (SiCf) may improve both the physical and mechanical properties of CMCs and lead to an increase in their tolerance to failure. This work describes the fabrication and characterization of novel preceramic paper-derived SiCf/SiCp composites fabricated by spark plasma sintering (SPS). The sintering temperature and pressure were 2100 °C and 20–60 MPa, respectively. The content of fibers in the composites was approx. 10 wt.%. The matrix densification and fiber distribution were examined by X-ray computed tomography and scanning electron microscopy. Short processing time avoided the destruction of SiC fibers during SPS. The flexural strength of the fabricated SiCf/SiCp composites at room temperature varies between 300 and 430 MPa depending on the processing parameters and microstructure of the fabricated composites. A quasi-ductile fracture behavior of the fabricated composites was observed.

scholarly journals Optimization of the phase composition of hard alloys obtained by spark plasma sintering of powders WC + 10% Co

2019 ◽  
Vol 1347 ◽  
pp. 012064 ◽  
Author(s):  
Ksenia E. Smetanina ◽  
Pavel V. Andreev ◽  
Natalia V. Malekhonova ◽  
Evgeny A. Lantsev
Keyword(s):  
Phase Composition ◽  
Spark Plasma Sintering ◽  
Hard Alloys ◽  
Plasma Sintering ◽  
Spark Plasma

Comparison of the mechanical properties of "BK6" hard alloys obtained by the traditional method and by spark plasma sintering

2019 ◽  
pp. 55-62
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Spark Plasma Sintering ◽  
Traditional Method ◽  
Thin Sheet ◽  
Hard Alloys ◽  
Power Drive ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Th 1

The existing multi-link power drives from thermally thin power elements from a TH-1 alloy with shape memory are analyzed. An effective method for assembling a unit of power elements and the use of a multi-link power drive in a laboratory press for separating thin-sheet blanks are pro¬posed.

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