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Cerium enrichment on sinter skin of mischmetal doped WC-Co cemented carbide

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Abstract

Rare earth-doped WC-Co cemented carbides with low carbon-containing level were prepared by adding mischmetal (mainly containing lanthanum and cerium) in the form of cobalt pre-alloyed powder during ball-milling. After sintering, the sinter skin (exterior) was observed and analyzed by scanning electron microscopy (SEM) and energy disperse X-ray spectroscopy (EDXS). The results show that during the sintering process lanthanum and cerium are separated and cerium predominantly migrates towards the surface forming precipitates containing oxygen. Thermodynamic analysis and polarization of cerium atom caused by the strong interaction between cerium atoms and high energy carbon atoms were used in explaining the observed phenomenon.

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References

  1. Dübel W, Flurschütz W, Kohlermann R. Hard Metal Alloy[P]. UK 1 077 921, 1967.

  2. XU Chong-hai, AI Xing, HUANG Chuan-zhen. Research and development of rare-earth cemented carbides[J]. International Journal of Refractory Metals & Hard Materials, 2001, 19 (3): 159–168.

    Article  Google Scholar 

  3. CHEN Li-min, LIN Cheng-guang, Gerhard G, et al. Rare earth elements (RE) doped cemented carbides [J]. P/M Science & Technology Briefs, 1999, 1(5): 11–15.

    Google Scholar 

  4. XIONG Ji, YANG Jian-gao, GUO Xing-hua. Application of rare earth elements in cemented carbide inserts, drawing dies and mining tools[J]. Materials Science and Engineering A, 1996, A209: 287–293.

    Google Scholar 

  5. ZHANG Li, CHEN Shu. Rare earth elements doped new cemented carbide with Ni-Co binder for mining [J]. Journal of Central South University of Technology, 2000, 7(3): 143–145.

    Article  MathSciNet  Google Scholar 

  6. WANG You-ming, HE Cong-xun, ZHAO Bo-lan, et al. Cemented carbides with rare earth in China[J]. Chinese Tungsten Industry, 1999, 14(5–6):186–194. (in Chinese)

    Google Scholar 

  7. YUAN Yi, WANG Xing-yi, WU Ying-fang. Mechanism of improving the wearability of WC78-TiC14-Co8 cemented carbide with yttrium addition[J]. Journal of Rare Earths, 1997, 15(4): 276–281.

    Google Scholar 

  8. ZHANG Li, Schubert W D, HUANG Bai-yun, et al. Surface observation of rare earth doped cemented carbide[J]. P/M Science & Technology Briefs, 2003, 5 (3): 17–21.

    Google Scholar 

  9. ZHANG Li, Schubert W D, CHEN Shu, et al. Rare earth enrichment phenomenon during the sintering process of grainy hardmetal[J]. Materials Science and Engineering A, 2004, 384 (1–2):395–401.

    Google Scholar 

  10. ZHANG Li, CHEN Shu, HUANG Bai-yun, et al. Separation phenomenon of La and Ce during the sintering process of rare earth doped cemented carbides [A]. Kneringer G, Rödhammer P, Wildner H. Proceedings of the 16th International Plansee Seminar [C]. Reutte: Plansee Holding AG, 2005. 574–587.

  11. Brookes K J A. Rock tools lead the way in drilling [J]. Metal Powder Report, 1992, 47(12): 48–51.

    Article  Google Scholar 

  12. LI Zheng-wei, HE Ye-dong, QI Hui-bin, et al. Diagrams on the standard free energy change per unit volume for the formation of oxide, sulfide, carbide, nitride[J]. The Chinese Journal of Nonferrous Metals, 1998, 8(S1): 55–60. (in Chinese)

    Google Scholar 

  13. Metal Department of Zhong Shan University. Data on the Physics and Chemistry of Rare Earths[M]. Beijing: Metallurgy Industry Press, 1978. (in Chinese)

    Google Scholar 

  14. JI Zhe-sheng, XIA Li-fang, WAN Hai-bo, et al. Phase composition of initial rare earth-B-Al permeation layer[J]. The Chinese Journal of Nonferrous Metals, 1998, 8(S1): 66–69. (in Chinese)

    Google Scholar 

  15. Kolaska H, Hirschfeld D, Grewe H. Powder Metallurgy of Hardmetals-Lecture 9-Testing of Hardmetals [M]. Shrewsbury: EPMA, 1995, 9122.

    Google Scholar 

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Authors and Affiliations

  1. State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China

    Zhang Li PhD, Xiong Xiang-jun & Huang Bai-yun

  2. Changsha Mining and Metallurgy Research Institute, 410012, Changsha, China

    Chen Shu

  3. School of Metallurgical Science and Engineering, Central South University, 410083, Changsha, China

    Zhang Chuan-fu

Authors
  1. Zhang Li PhD
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  2. Chen Shu
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  3. Xiong Xiang-jun
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  4. Huang Bai-yun
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  5. Zhang Chuan-fu
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Corresponding author

Correspondence to Zhang Li PhD.

Additional information

Foundation item: Project (2004036428) supported by the Postdoctoral Science Foundation of China; project supported by the Postdoctoral Science Foundation of Central South University; project (50323008) supported by the National Natural Science Foundation of China; project (04JJ3084) supported the Natural Science Foundation of Hunan Province

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Zhang, L., Chen, S., Xiong, Xj. et al. Cerium enrichment on sinter skin of mischmetal doped WC-Co cemented carbide. J Cent. South Univ. Technol. 12 (Suppl 1), 5–8 (2005). https://doi.org/10.1007/s11771-005-0361-x

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  • DOI: https://doi.org/10.1007/s11771-005-0361-x

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