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Gradient Structure Evolution During Sintering of WC-TiC-Co Cemented Carbides

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Titel: Gradient Structure Evolution During Sintering of WC-TiC-Co Cemented Carbides
Autoren: Sten, Stella, Odqvist, Joakim, Norgren, Susanne, Hedström, Peter
Weitere Verfasser: Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Industrial and Mechanical Sciences, Production and Materials Engineering, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för industri- och maskinvetenskaper, Industriell Produktion, Originator, Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), SPI: Sustainable Production Initiative, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), SPI: Sustainable Production Initiative, Originator
Quelle: JOM. 77(4):1979-1991
Schlagwörter: Engineering and Technology, Materials Engineering, Metallurgy and Metallic Materials, Teknik, Materialteknik, Metallurgi och metalliska material
Beschreibung: Functional gradient sintering of WC-TiC-Co cemented carbides was studied to reveal the effect of powder metallurgical processing conditions on compositional and microstructural, as well as hardness and toughness, gradients. The samples were created by local addition of TiC prior to sintering. Two different starting WC powders, one sub-micron and one medium-coarse, were used. Sintering at two different temperatures of 1410°C and 1475°C was compared. The local addition of TiC created a Ti/Co gradient that affected the structural evolution during sintering. The measured Ti/Co gradient after sintering at 1410°C and 1475°C differed, and the difference was especially apparent for the sample prepared using a sub-micron powder. After sintering at 1475°C, the sample prepared from the sub-micron powder exhibited a large WC grain size gradient and elongated or plate-like WC grains where the Ti concentration was high. In contrast, the sample prepared from the medium-coarse powder only showed a WC grain size gradient and no plate-like WC grain formation. It was also observed that the WC grain surfaces had growth ledges in both samples when the Ti content was enhanced, indicating the influence of Ti on the WC grain growth mechanism.
Zugangs-URL: https://doi.org/10.1007/s11837-025-07127-2
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  Group: Ti
  Data: Gradient Structure Evolution During Sintering of WC-TiC-Co Cemented Carbides
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  Data: <searchLink fieldCode="AR" term="%22Sten%2C+Stella%22">Sten, Stella</searchLink><br /><searchLink fieldCode="AR" term="%22Odqvist%2C+Joakim%22">Odqvist, Joakim</searchLink><br /><searchLink fieldCode="AR" term="%22Norgren%2C+Susanne%22">Norgren, Susanne</searchLink><br /><searchLink fieldCode="AR" term="%22Hedström%2C+Peter%22">Hedström, Peter</searchLink>
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  Data: Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Industrial and Mechanical Sciences, Production and Materials Engineering, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för industri- och maskinvetenskaper, Industriell Produktion, Originator<br />Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), SPI: Sustainable Production Initiative, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), SPI: Sustainable Production Initiative, Originator
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  Data: <i>JOM</i>. 77(4):1979-1991
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  Data: <searchLink fieldCode="DE" term="%22Engineering+and+Technology%22">Engineering and Technology</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+Engineering%22">Materials Engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Metallurgy+and+Metallic+Materials%22">Metallurgy and Metallic Materials</searchLink><br /><searchLink fieldCode="DE" term="%22Teknik%22">Teknik</searchLink><br /><searchLink fieldCode="DE" term="%22Materialteknik%22">Materialteknik</searchLink><br /><searchLink fieldCode="DE" term="%22Metallurgi+och+metalliska+material%22">Metallurgi och metalliska material</searchLink>
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  Data: Functional gradient sintering of WC-TiC-Co cemented carbides was studied to reveal the effect of powder metallurgical processing conditions on compositional and microstructural, as well as hardness and toughness, gradients. The samples were created by local addition of TiC prior to sintering. Two different starting WC powders, one sub-micron and one medium-coarse, were used. Sintering at two different temperatures of 1410°C and 1475°C was compared. The local addition of TiC created a Ti/Co gradient that affected the structural evolution during sintering. The measured Ti/Co gradient after sintering at 1410°C and 1475°C differed, and the difference was especially apparent for the sample prepared using a sub-micron powder. After sintering at 1475°C, the sample prepared from the sub-micron powder exhibited a large WC grain size gradient and elongated or plate-like WC grains where the Ti concentration was high. In contrast, the sample prepared from the medium-coarse powder only showed a WC grain size gradient and no plate-like WC grain formation. It was also observed that the WC grain surfaces had growth ledges in both samples when the Ti content was enhanced, indicating the influence of Ti on the WC grain growth mechanism.
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