Microstructure and Mechanical Properties of Cobalt-Based Alloys Strengthened with Tantalum Carbide Powder <i>via</i> Vacuum Sintering and HIP Treatments

WC-8Co cemented carbide specimens were prepared via vacuum sintering. The effects of cold isostatic pressing (CIP) on microstructure and mechanical properties were investigated. The results show that only WC and Co3W3C (γ-phase) were detected by XRD without any else phases, even though Co. Dense WC-8Co cemented carbide samples were obtained and relative density reached over 98%. The pressing method, instead of pressure, took an important role in the mechanical properties of WC-8Co cemented carbide. KIC and TRS of WC-8Co cemented carbide were improved at least 27% and 24%, respectively, by the use of CIP. WC-8Co cemented carbide with excellent mechanical properties (HRA>93.5, KIC>11MPa·m1/2, TRS>870MPa) was obtained by using CIP.

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Effects of Particle Size of Pre-Alloy Powders and Vacuum Sintering Temperatures on the Microstructure and Mechanical Properties of 440C Stainless Steel

ISIJ International ◽

10.2355/isijinternational.isijint-2015-469 ◽

2016 ◽

Vol 56 (2) ◽

pp. 335-340 ◽

Cited By ~ 5

Author(s):

Kuo-Tsung Huang ◽

Shih-Hsien Chang ◽

Ming-Wei Wu ◽

Chih-Kai Wang

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Stainless Steel ◽

Vacuum Sintering ◽

Microstructure And Mechanical Properties

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The Effects of HIP, Solution Heat Treatment and Aging Treatments on the Microstructure and Mechanical Properties of Sintering Cobalt-Based Alloys Strengthened with Tantalum Carbide Additives

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.m2014066 ◽

2014 ◽

Vol 55 (11) ◽

pp. 1755-1761 ◽

Cited By ~ 4

Author(s):

Shih-Hsien Chang ◽

Chien-Chung Chen

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Solution Heat Treatment ◽

Tantalum Carbide ◽

Microstructure And Mechanical Properties

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Effect of SiC Nanowhisker on the Microstructure and Mechanical Properties of WC-Ni Cemented Carbide Prepared by Spark Plasma Sintering

The Scientific World JOURNAL ◽

10.1155/2014/673276 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8

Author(s):

Xiaoyong Ren ◽

Zhijian Peng ◽

Zhiqiang Fu ◽

Chengbiao Wang

Keyword(s):

Mechanical Properties ◽

Spark Plasma Sintering ◽

Tantalum Carbide ◽

Uniaxial Pressure ◽

Cemented Carbides ◽

X Ray Diffraction ◽

Microstructure And Mechanical Properties ◽

Plasma Sintering ◽

Spark Plasma ◽

Microscopy Examination

Ultrafine tungsten carbide-nickel (WC-Ni) cemented carbides with varied fractions of silicon carbide (SiC) nanowhisker (0–3.75 wt.%) were fabricated by spark plasma sintering at 1350°C under a uniaxial pressure of 50 MPa with the assistance of vanadium carbide (VC) and tantalum carbide (TaC) as WC grain growth inhibitors. The effects of SiC nanowhisker on the microstructure and mechanical properties of the as-prepared WC-Ni cemented carbides were investigated. X-ray diffraction analysis revealed that during spark plasma sintering (SPS) Ni may react with the applied SiC nanowhisker, forming Ni2Si and graphite. Scanning electron microscopy examination indicated that, with the addition of SiC nanowhisker, the average WC grain size decreased from 400 to 350 nm. However, with the additional fractions of SiC nanowhisker, more and more Si-rich aggregates appeared. With the increase in the added fraction of SiC nanowhisker, the Vickers hardness of the samples initially increased and then decreased, reaching its maximum of about 24.9 GPa when 0.75 wt.% SiC nanowhisker was added. However, the flexural strength of the sample gradually decreased with increasing addition fraction of SiC nanowhisker.

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Microstructure and Mechanical Properties of Multicomponent Metal Ti(C,N)-Based Cermets

Metals ◽

10.3390/met10070927 ◽

2020 ◽

Vol 10 (7) ◽

pp. 927

Author(s):

Xuelei Wang ◽

Qiufeng Wang ◽

Zhaojun Dong ◽

Xiaoqian Zhou ◽

Xiaoliang Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Energy Dispersive Spectrometry ◽

Bending Strength ◽

Binder Phase ◽

X Ray Diffraction ◽

Vacuum Sintering ◽

X Ray ◽

Weight Percentage ◽

Microstructure And Mechanical Properties ◽

Backscatter Scanning Electron Microscopy

Ti(C,N)-based cermets with multicomponent ingredients were prepared using vacuum sintering technology. The effect of molding agents, binder phase and sintering temperature on Ti(C,N)-based cermets were studied. The optimum molding performance was obtained by adding 2% polyvinyl alcohol (PVA-1788). The microstructure and mechanical properties of Ti(C,N)-based cermets were investigated. The Ti(C,N)-based cermet with a weight percentage of TiC:TiN:Ni:Co:Mo:WC:Cr3C2:C = 40:10:20:10:7:8:4:1 and sintered at 1450 °C had the optimal mechanical properties. The relative bending strength, Vickers hardness, elastic modulus and wear resistance were 2010 MPa, 15.01 GPa, 483.57 GPa and 27 mg, respectively. Additionally, X-ray diffraction (XRD), backscatter scanning electron microscopy pictures (SEM–BSE), energy dispersive spectrometry (EDS) and optical micrographs of Ti(C,N)-based cermets were characterized.

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