The Influence of Calcium Additive in the Structural Formation of Tungsten via Reduction Reaction

Xin Yang; Dun Qiang Tan; Ya Lei Li; Wen He; Hong Bo Zhu; Lei Lu; De Ping Lu

doi:10.4028/www.scientific.net/AMR.1088.159

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1088The Influence of Calcium Additive in the...

The Influence of Calcium Additive in the Structural Formation of Tungsten via Reduction Reaction

Abstract:

With the processes of solution doping and hydrogen reduction process, the raw materials APT powder was converted into the tungsten with calcium additive. Micro-morphology, micro-structure, the existing form of element calcium and their distribution were examined by SEM, HRTEM and EDS. The results show that Element calcium is mainly in the form of CaWO₄ in tungsten oxide powder and has two calcium tungstate forms which are CaWO₄ and Ca_4.26W₁₀O₃₀in reducing tungsten powder. The Ca-W-O particles are embedding in the tungsten powder particles; the rest distribute between the tungsten powder particles.

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Periodical:

Advanced Materials Research (Volume 1088)

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159-163

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1088.159

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Online since:

February 2015

Authors:

Xin Yang, Dun Qiang Tan, Ya Lei Li, Wen He, Hong Bo Zhu, Lei Lu, De Ping Lu

Keywords:

Ca Doping, Hydrogen Reduction, Microstructure, Tungsten

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References

[1] Jian-gao Yang, Dun-qiang Tan, Hao Chen, in: Cemented Carbide, edited by Tao Luo, Series of Theoretical and Technological Frontiers of Nonferrous Metals, chapter, 1, Central South University Press(2012).

Google Scholar

[2] Harjinder Singh, O. P. Pandey: Ceram. Int. Vol. 39(2013), p.6703.

Google Scholar

[3] Xiang-wei Wu, Jing-song Luo, Bi-zhi Lu: T. Nonferr. Metal. Soc. Vol. 19(2009), p.785.

Google Scholar

[4] Chong-hu Wu: Int. J. Refract. Met. Hard Mater. Vol. 29(2011), p.686.

Google Scholar

[5] Schubert W D, Lassner E: Int. J. Refract. Met. Hard Mater. Vol. 10(1991), p.133.

Google Scholar

[6] Schubert W D, Lassner E: Int. J. Refract. Met. Hard Mater. Vol. 10(1991), p.171.

Google Scholar

[7] Xiao-juan Xu, Li-ying Zhang, Zhi-meng Guo: Powder Metallurgy Technology. Vol. 20(2002), p.147.

Google Scholar

[8] Feng Zheng: Cemented Carbide. Vol. 12(1995), p.143.

Google Scholar

[9] Bao-qi Sun, Yi-ming Chen: Rare Metal and Cemented Carbide. Vol. 16(1999), p.1.

Google Scholar

[10] Lian-ying Fu: Cemented Carbide. Vol. 12(1995), p.216.

Google Scholar

[11] Haubner R, Schubert W D, Lassner E: Int. J. Refract. Met. Hard Mater. Vol. 6(1987), p.161.

Google Scholar

[12] Qing-feng Wei, Jing Sun, Chang-qing Li: Rare Metals and Cemented Carbide. Vol. 30(2002), p.33.

Google Scholar