Diamond fibres with soft ferromagnetic cores and a large magnetic shape anisotropy, were manufactured by chemical vapour deposition on to Fe and Fe-Cr steel wires. The wire cores were carburised during deposition and had a hardness of ∼550 kgf mm−2 (54 GPa). The fibres had an electrical resistivity of ∼ 153 μΩm and an elastic modulus of ∼ 600 GPa. Magnetic hysteresis loops (magnetisation v. applied field strength) and magnetic properties for the diamond fibres were compared with corresponding datafor Fe and Fe-Cr wires. The fibres may produce composites with a unique combination of properties.
Get full access to this article
View all access options for this article.
References
1.
FIELDJ. E.: The properties of diamond'; 1979, London, Academic Press.
2.
PARTRIDGER G., MAYP. W., and ASHFOLDM. N. R.: Mater. Sci. Technol.,1994, 10, 177–189.
3.
NICHOLSONE. D., BAKERT. W., REDMANS. A., KALAUGHERE., ROSSERK. N., EVERITTN. M., ASHFOLDM. N. R., and PARTRIDGEP. G.: Diam. Relat. Mater.,1996, 5, 658–663.
4.
PARTRIDGEP. G., MAYP. W., REGOC. A., and ASHFOLDM. N. R.: Mater. Sci. Technol.,1994, 10, 505–512.
5.
ASHFOLDM. N. R., MAYP. W., NICHOLSONE. D., PARTRIDGEP. G., MEADENG., WISBEYA., and WOODM. J.: in Proc. 3rd Int. Conf. on ‘Applications of diamond films and related materials’, (ed. FeldmanA.et al.), Gaithersburg, MD, USA, August 1995, National Institute of Standards and Technology, 529-532.
6.
PARTRIDGEP. G., YOUNESC. M., NICHOLSONJ., MEADENG., NICHOLSONE. D., BLEAYS., and GILMOREC.: J. Mater. Sc., to be published.
7.
CULLITYB. D.: ‘Introduction to magnetic materials’; 1972, Reading, MA, Addison-Wesley.
8.
GOLDFARBR. B. and FICKETTF. R.: NBS special publication 696, National Institute of Standards and Technology, Washington, DC, USA, 1985.
9.
McELFRESHM.: ‘Fundamentals of magnetism and magnetic measurements’; 1994, Quantum Design.
10.
BOZORTHR. M.: ‘Ferromagnetism’; 1951, Princeton, NJ, Van Nostrand.
11.
‘Encyclopedia of inorganic chemistry’, Vol. 2, 519; 1994, Chichester, Wiley.
12.
TEBBLER. S. and CRAIKD. J.: ‘Magnetic materials’, 90; 1969, Wiley.
13.
LUBORSKYF. E., LIVINGSTONI. D., and CHING. Y.: ‘Physical metallurgy’, 1673; 1983, Elsevier.
14.
‘Kaye and Laby tables of physical and chemical constants’, 138; 1993, Singapore, Longman Scientific and Technical.
15.
WISBEYA.: Personal communication, 1997.
16.
PARTRIDGEP. G. and WARD-CLOSEC. M.: hit. Mater. Rev.,1993, 38, 1–24.
17.
NEELAKANTAP. S. and SUBRAMANIAMK.: Adv. Mater. Process.,1992, (3), 20.
18.
MEADENG., PARTRIDGEP. G., NICHOLSONJ. A., and NICHOLSONE. D.: unpublished work.
