Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Joining and properties of electrode for CoSb3 thermoelectric materials prepared by a spark plasma sintering method

방전 플라즈마 소결법을 이용한 CoSb3계 열전재료의 전극 접합 및 특성

  • Kim, K.H. (Business Support Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Park, J.S. (Business Support Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Ahn, J.P. (Business Support Division, Korea Institute of Ceramic Engineering and Technology)
  • 김경훈 (한국세라믹기술원 기업지원본부) ;
  • 박주석 (한국세라믹기술원 기업지원본부) ;
  • 안종필 (한국세라믹기술원 기업지원본부)
  • Published : 2010.02.28
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Abstract

$CoSb_3$-based skutterudite compounds are promising candidates as thermoelectric (TE) materials used in intermediate temperature region. In this study, sintering of $CoSb_3$ powder and joining of $CoSb_3$ to copper-molybdenum electrode have been simultaneously performed by spark plasma sintering technique. The Ti foil was used for preventing the diffusion of copper into $CoSb_3$ and the Cu : Mo = 3 : 7 Vol. ratio composition was selected by the consideration of thermal expansion coefficients. The insertion of Ti interlayer between Cu-Mo and $CoSb_3$ was effective to join $CoSb_3$ to Cu-Mo by forming an intermediate layer of $TiSb_2$ at the Ti-$CoSb_3$ boundary. However, the formation of TiSb and TiCoSb intermediate layers deteriorated the joining properties by the generation of cracks in the interface of intermediate layer/$CoSb_3$ and intermediate/intermediate layers.

중고온용 열전 소재로 우수한 특성을 나타내는 $CoSb_3$계 소재의 열전 소자 제조를 위해 방전플라즈마 소결법을 이용하여 소결 및 Cu-Mo 전극 소재와의 접합을 동시에 실시하였다. $CoSb_3$ 내부로의 Cu 확산을 방지하기 위해 Ti을 중간층으로 삽입하였으며 열팽창계수의 조절을 위해 Cu : Mo = 3 : 7 부피비 조성을 선택하였다. 삽입된 Ti과 $CoSb_3$는 $TiSb_2$ 이 차상을 형성하면서 접합이 진행되었지만 접합 온도 및 접합 시간의 증가에 따라 TiSb 및 TiCoSb 등의 상의 형성에 의해 접합 계면에서 균열이 발생되어 접합 특성을 악화시키는 것으로 밝혀졌다.

Keywords

References

  1. D.M. Rowe, "Thermoelectrics, an environmentally friendly source of electrical power", Renew. Energ. 16 (1999) 1251. https://doi.org/10.1016/S0960-1481(98)00512-6
  2. F.J. Disa, "Thermoelectric cooling and power generation", Science 285 (1999) 703.
  3. B.C. Sales, D. Mandrus and R.K. Williams, "Filled skutterudite antimonides: A new class of thermoelectric materials", Science 272 (1999) 1325.
  4. G.S. Nolas, J.L. Cohn and G.A. Slack, "Effect of partial void filling on the lattice thermal conductivity of skutterudites", Phys. Rev. B 58 (1998) 164. https://doi.org/10.1103/PhysRevB.58.164
  5. X.F. Tang, L.M. Zhang, R.Z. Yuan, L.D. Chen, T. Goto, T. Hirai, W. Chen and C. Uher, "High temperature thermoelectric properties of n-type $Ba_yNi_xCO_{4_x}Sb_{12}$", J. Mater. Res. 16 (2001) 3343. https://doi.org/10.1557/JMR.2001.0460
  6. M. Puyet, B. Lenoir, A. Dauscher, M. Dehmas, C. Stiewe and E. Muller, "High temperature transport properties of partially filled $Ca_xCO_4Sb_{12}$ skutterudites", J. Appl. Phys. 95 (2004) 4852. https://doi.org/10.1063/1.1688463
  7. J. Fan, L. Chen, S. Bao and X. Shi, "Joining of Mo to CoSb_3$ by spark slasma sintering by inserting a Ti interlayer", Mater. Lett. 58 (2004) 3876. https://doi.org/10.1016/j.matlet.2004.07.041
  8. S.J. Lee and S.K. Wu, "Infrared joining strength and interfacial microstructures of Ti-48Al-2Nb-2Cr intermetallics using Ti-15Cu-15Ni foil", Intermetallics 7 (1999) 11. https://doi.org/10.1016/S0966-9795(98)00004-1
  9. Z. Degang, L. Xiaoya, H. Lin, J. Wan and L. Chen, "High temperature reliability evaluation of CoSb/electrode thermoelectric joints", Intermetallics 17 (2009) 136. https://doi.org/10.1016/j.intermet.2008.10.010
  10. M. Tokita, "Trends in advanced SPS (spark plasma sintering) systems and technology", J. Soc. Powder Tech. Jpn. 30 (1993) 790. https://doi.org/10.4164/sptj.30.11_790
  11. M. Omori, "Sintering, consolidation, reaction and crystal growth by the spark plasma sintering (SPS)", Mater. Sci. Eng. A 287 (2000) 183. https://doi.org/10.1016/S0921-5093(00)00773-5
  12. K.H. Kim and K.B. Shim, "The effect of lanthanum on the fabrication of $ZrB_2-ZrC$ composites by spark plasma sintering", Mater. Charac. 50 (2003) 31. https://doi.org/10.1016/S1044-5803(03)00055-X
  13. M.J. Kim, H.M. Choi, S.C. Ur and I.H. Kim, "Thermoelectric properties of $CO_{1-x}Ni_xSb_3$ prepared by encapsulated induction melting", Kor. J. Mater. Res. 16 (2006) 377. https://doi.org/10.3740/MRSK.2006.16.6.377

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