Strength Variability in Silicon-Disilicide Eutectic Alloys
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Silicon-disilicide eutectic alloys have recently been evaluated as potential structural materials with improved combinations of hardness, toughness and wear resistance as compared to either of their constituent phases. Here, compression tests were carried out on Si, Si–7V, Si–20Cr and Si–13.9Cr–3.4V (in wt%) alloys, wherein Si–7V, Si–20Cr and Si–13.9Cr–3.4V exhibited silicon-disilicide eutectic structures. Strength variability was ascertained via a Weibull analysis, with the ternary alloy Si–13.9Cr–3.4V yielding a Weibull modulus value of 15.2 as compared to 4.6 for Si. Scanning electron microscopy studies provided some insight on the fracture strength and Weibull modulus of these materials.
KeywordsSilicon Eutectics Weibull modulus
The author is grateful to Prof. Christopher Schuh at MIT for his encouragement and guidance during the course of this work.
- 1.Weibull W, J Appl Mech 18 (1951) 293.Google Scholar
- 2.Weibull W, Appl Mech Rev 5 (1952) 449.Google Scholar
- 3.Askeland D R, Science and Engineering of Materials, PWS Publishing, Boston (1994).Google Scholar
- 8.Fischer D S, and Schuh C A, J Am Ceram Soc (2012) 1.Google Scholar
- 13.Fischer D, Development of In Situ Toughened Silicon-Rich Alloys: A New Class of Castable Engineering Ceramics, PhD Thesis, MIT (2010).Google Scholar
- 19.Roohani-Esfahani S-I, Newman P, and Zreiqat H, Sci. Rep 6 19468 (2016) 1.Google Scholar
- 20.Becher P F, Hsueh C H, Alexander K B, Lin H T, Warwick W H, Westmoreland C G, and Waters S B, Silic Ind 60 (1995) 239.Google Scholar
- 24.Kumar K S, and Liu C T, J Met 45 (1993) 28.Google Scholar
- 27.Hori S, Kaji H, Yoshimura M, and Somiya S, in Adv Str Ceramics MRS Proceedings, (eds) Becher P F, Swain M V, and Somiya S, 78 (1986) p 283.Google Scholar