The Crystal Growth of Ti₅₀Cu₂₃Ni₂₀Sn₇ during the SPS Process

Abstract:

Ti₅₀Cu₂₃Ni₂₀Sn₇ bulk amorphous alloy was prepared by mechanical alloying and spark plasma sintering. The milling was performed in a high-energy planetary ball mill. XRD showed that after milled 35h, fully amorphous powders can be obtained, under the condition of the milling speed, 300rpm, and the weighs ratio of ball to powder, 20:1. Thermal stability of the as-milled amorphous powder was determined by DSC at the heating rate of 40K/min. The glass transition T_g and the initial crystallization temperature T_x1 was 746K and 782K, respectively. Then, the obtained amorphous alloy powder was compacted by spark plasma sintering at the temperature of 753K, 763K, 773K, 783K and 793K under the compress of 500Mpa. Crystal structure and the morphology of the sintered samples were investigated by XRD and SEM, respectively. When sintered near the glass transition temperature, the SPS sintered samples remained complete amorphous, crystalline peak did not appear in the XRD curves. As the sintering temperature increased, the crystalline phases in the sample began to increase. It was shown that when sintered at 753K and 763K, the samples had fewer defects, and it was completely amorphous alloy. When the sintering temperature increased to 773K, more defects appeared, including point-like defects and disc-shaped defects. The disc-shaped defect was widespread in the specimens sintered at 783K and 793K.

• Periodical: Advanced Materials Research (Volume 428)
• Pages: 190-195
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.428.190
• Online since: January 2012
• Authors: Qiang Li, Yu Ying Zhu, Yun Hua He, Ge Wang, Xing Hua Wang
• Keywords: Amorphous Alloy, Crystal Growth: SPS, Ti₅₀Cu₂₃Ni₂₀Sn₇

References

[1] Y.C. Kim, W.T. Kim and D.H. Kim. A development of Ti-based bulk metallic glass. Mater. Sci. Eng. A 375-377 (2004) 127-135.

DOI: 10.1016/j.msea.2003.10.115

[2] A. Terayama, H. Kyogoku. Shape memory characteristics of the P/M-processed Ti–Ni–Cu alloys. Mater. Sci. Eng. A 527 (2010) 5484–5491.

DOI: 10.1016/j.msea.2010.05.012

[3] J J Oak, D V Louzguine-Luzgin and A Inoue. Investigation of glass-forming ability, deformation and corrosion behavior of Ni-free Ti-based BMG alloys designed for application as dental implants. Mater. Sci. Eng. C, 29 (2009) 322–327.

DOI: 10.1016/j.msec.2008.07.009

[4] Akihisa Inoue, Nobuyuki Nishiyama and Kenji Amiya. Ti-based amorphous alloys with a wide supercooled liquid region. Materials Let. 61 (2007) 2851–2854.

DOI: 10.1016/j.matlet.2007.03.048

[5] M.F. de Oliveira, F.S. Pereira and B.T. Ramasco et al. Glass formation of alloys selected by lambda and electronegativity criteria in the Ti–Zr–Fe–Co system. J. Alloys Compd. 495 (2010) 316–318.

DOI: 10.1016/j.jallcom.2009.10.255

[6] X Wei, X F Wang and F SH Han, et al. Thermal stability of the Al70Ni10Ti10Zr5Ta5 amorphous alloy powder fabricated by mechanical alloying. J. Alloys Compd., 496 (2010) 313–316.

DOI: 10.1016/j.jallcom.2010.02.003

[7] K D Machado, G A Maciel and D F Sanchez, et al. Structural study of an amorphous Cu64Ti36 alloy produced by mechanical alloying using XRD, EXAFS and RMC simulations. Solid State Commun., 150 (2010) 1674-1678.

DOI: 10.1016/j.ssc.2010.06.027

[8] M Omori. Sintering, consolidation, reaction and crystal growth by the spark plasma system (SPS). Mater. Sci. Eng. A, 287(2000) 183-188.

DOI: 10.1016/s0921-5093(00)00773-5

[9] Z A Munir, U Anselmi-Tamburini and M Ohyanagi. The effect of electric field and pressure on the synthesis and consolidation of materials: A review of the spark plasma sintering method. J. Mater. Sci., 41(2006)763-777.

DOI: 10.1007/s10853-006-6555-2

[10] Q Li, G Wang and X P Song, et al. Ti50Cu23Ni20Sn7 bulk metallic glasses prepared by mechanical alloying and spark-plasma sintering. J. Mater. Process. Technol., 209 (2009) 3285-3288.

DOI: 10.1016/j.jmatprotec.2008.07.050

[11] LI Duarte, UE Klotz, C Leinenbach, et al. Experimental study of the Fe–Ni–Ti system. Intermetallics, 18(2010) 374-384.

DOI: 10.1016/j.intermet.2009.08.008

[12] J De Keyzer, G Cacciamani and N Dupin. Thermodynamic modeling and optimization of the Fe-Ni-Ti system. CALPHAD: Computer Coupling of Phase Diagrams and Thermochemistry, 33(2009)109-123.

DOI: 10.1016/j.calphad.2008.10.003

[13] Wang Ge, Li Qiang and Song Xueping, et al. Ti-Based Bulk Metallic Glasses Produced by Mechanical Alloying and Spark-Plasma Sintering. Rare Metal Mater. Eng. 37(2008)712-715.

[14] P.P. Choi, J.S. Kim, O.T.H. Nguyen. Ti50Cu25Ni20Sn5 bulk metallic glass fabricated by powder consolidation. Mater. Letters 61 (2007) 4591–4594.

DOI: 10.1016/j.matlet.2007.02.066

[15] I-Kuan Jeng, Chung-Kwei Lin and Pee-Yew Lee. Formation and characterization of mechanically alloyed Ti–Cu–Ni–Sn bulk metallic glass composites. Intermetallics, 14 (2006) 957–961.

DOI: 10.1016/j.intermet.2006.01.031