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Study of thermal expansion and thermal conductivity of cemented WC–Co composite.

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Title: Study of thermal expansion and thermal conductivity of cemented WC–Co composite.
Authors: Wang, Hongtao1 hongtao.wang@kennametal.com, Webb, Tim1, Bitler, Jonathan W.1
Source: International Journal of Refractory Metals & Hard Materials. Mar2015, Vol. 49, p170-177. 8p.
Subjects: Thermal expansion, Thermal conductivity, Thermodynamics, Tungsten carbide, Tungsten compounds
Abstract: Thermal properties are important to the cemented tungsten carbide product design and the product life. In this study, the thermal expansion and thermal conductivity of WC–Co material were measured using dilatometry and laser flash methods respectively. The effects of cobalt content, WC grain size and magnetic saturation (MS) on the thermal properties of cemented tungsten carbide were investigated. The results show that coefficient of thermal expansion (CTE) of WC–Co is strongly dependent on cobalt content. Grain size and MS have no clear effects on CTE. In contrast, the thermal conductivity of WC–Co is affected by all the factors. Larger grain size and less cobalt lead to higher thermal conductivity. High magnetic saturation increases thermal conductivity. The correlation equations of CTE/thermal conductivity as a function of WC grain size/cobalt content are proposed and discussed in the study. By considering the effects of WC/Co interface on the thermal properties, both thermal expansion and thermal conductivity of WC–Co materials can be explained using the rule of mixture principle. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Refractory Metals & Hard Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 101934229
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Study of thermal expansion and thermal conductivity of cemented WC–Co composite.
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Hongtao%22">Wang, Hongtao</searchLink><relatesTo>1</relatesTo><i> hongtao.wang@kennametal.com</i><br /><searchLink fieldCode="AR" term="%22Webb%2C+Tim%22">Webb, Tim</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bitler%2C+Jonathan+W%2E%22">Bitler, Jonathan W.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Refractory+Metals+%26+Hard+Materials%22">International Journal of Refractory Metals & Hard Materials</searchLink>. Mar2015, Vol. 49, p170-177. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Thermal+expansion%22">Thermal expansion</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten+carbide%22">Tungsten carbide</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten+compounds%22">Tungsten compounds</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Thermal properties are important to the cemented tungsten carbide product design and the product life. In this study, the thermal expansion and thermal conductivity of WC–Co material were measured using dilatometry and laser flash methods respectively. The effects of cobalt content, WC grain size and magnetic saturation (MS) on the thermal properties of cemented tungsten carbide were investigated. The results show that coefficient of thermal expansion (CTE) of WC–Co is strongly dependent on cobalt content. Grain size and MS have no clear effects on CTE. In contrast, the thermal conductivity of WC–Co is affected by all the factors. Larger grain size and less cobalt lead to higher thermal conductivity. High magnetic saturation increases thermal conductivity. The correlation equations of CTE/thermal conductivity as a function of WC grain size/cobalt content are proposed and discussed in the study. By considering the effects of WC/Co interface on the thermal properties, both thermal expansion and thermal conductivity of WC–Co materials can be explained using the rule of mixture principle. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Refractory Metals & Hard Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ijrmhm.2014.06.009
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 170
    Subjects:
      – SubjectFull: Thermal expansion
        Type: general
      – SubjectFull: Thermal conductivity
        Type: general
      – SubjectFull: Thermodynamics
        Type: general
      – SubjectFull: Tungsten carbide
        Type: general
      – SubjectFull: Tungsten compounds
        Type: general
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      – TitleFull: Study of thermal expansion and thermal conductivity of cemented WC–Co composite.
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            NameFull: Wang, Hongtao
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            NameFull: Webb, Tim
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            NameFull: Bitler, Jonathan W.
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            – D: 01
              M: 03
              Text: Mar2015
              Type: published
              Y: 2015
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              Value: 49
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            – TitleFull: International Journal of Refractory Metals & Hard Materials
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