Wear Behaviors of MoSi2 at Elevated Temperatures

Abstract:

Article Preview

MoSi2 was prepared by SHS, and then pressed under 300 MPa at room temperature and sintered at 1600 °C for 1 h in a vacuum furnace. The tribological properties of MoSi2 against Al2O3 in the temperature range from 700°C to 1100 °C were investigated. Microphotographs and phases of the worn surface of MoSi2 were observed by SEM and XRD. Results showed that MoSi2 has well friction and wear properties below 900 °C. When temperature rises from 900 °C to 1000 °C, wear rate of MoSi2 is raised by 20.8% which is attribute to the change of wear mechanism. The main wear mechanisms of MoSi2 are adhesion and oxidation at high temperatures. When over 900 °C, because of ductile - brittle transition characteristic of this material, plastic deformation and fracture are also found on the worn surface of MoSi2. This leads to the high wear rate of MoSi2.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

961-963

Citation:

H. A. Zhang et al., "Wear Behaviors of MoSi2 at Elevated Temperatures", Key Engineering Materials, Vols. 368-372, pp. 961-963, 2008

Online since:

February 2008

Export:

Price:

$38.00

[1] J.A. Hawk and D.E. Alman, N.S. Stoloff: Script. Metall. Mater. Vol. 31 (1994), p.473.

[2] J.A. Hawk and D.E. Alman: Script. Metall. Mater. Vol. 32(1995), p.725.

[3] J.A. Hawk, D.E. Alman and J.J. Petrovic: J. Am. Ceram. Soc. Vol. 79 (1996), p.1297.

[4] J.A. Hawk, D.E. Alman and J.J. Petrovic: Wear Vol. 203-204 (1997), p.247.

[5] J. Pan, M.K. Surappa, R.A. Saravanan, et al.: Mater. Sci. Eng. Vol. A244 (1998), p.191.

[6] H. Zhang, X. Hu, J. Yan, et al.: Wear Vol. 260 (2006), p.903.

[7] H. Zhang, J. Yan, P. Chen, et al.: Int. J. Refract. Met. Hard. Mater. Vol. 22 (2004), p.271.

[8] H. Zhang, S. Tang, J. Yan, et al.: Int. J. Refract. Met. Hard. Mater. (in press). Table 1 EDS results of dots in Fig. 3 Atom. % Area Mo Si Al Dot a in Fig. 5(a) Dot b in Fig. 5(a) Dot c in Fig. 5(a) Dot a in Fig. 5(b) Dot b in Fig. 5(b) Dot a in Fig. 5(c) Dot b in Fig. 5(c) Dot c in Fig. 5(c) Dot a in Fig. 5(d) Dot b in Fig. 5(d) Dot c in Fig. 5(d).

DOI: https://doi.org/10.7717/peerj.1727/fig-7

[28] 64.

[8] 03.

[12] 24.

[23] 08.

[9] 24.

[24] 58.

[1] 29.

[5] 62.

[20] 30.

[1] 51.

[7] 40.

[60] 81.

[18] 17.

[29] 66.

[55] 08.

[23] 64.

[54] 78.

[6] 06.

[2] 79.

[46] 58.

45.

[1] 07.

[10] 55.

[73] 80.

[58] 10.

[21] 84.

[67] 12.

[20] 64.

[92] 65.

[91] 59.

[33] 12.

[98] 04.

[91] 53 Fig. 4 XRD patterns of the worn surface of MoSi2 at 700 °C (a) and 1100 °C (b).