Microstructure and interfaces in diamond coated steel wires

• Published in: Journal of materials science Vol. 32; no. 16; pp. 4201 - 4208
• Main Authors: PARTRIDGE, P. G, YOUNES, C. M, NICHOLSON, J, MEADEN, G, NICHOLSON, E. D, BLEAY, S, GILMORE, C
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 15.08.1997; Springer Nature B.V
• Subjects: Applied sciences; Chemical vapor deposition; Chemical vapor deposition (including plasma-enhanced cvd, mocvd, etc.); Chromium; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Diamond films; Diamonds; Exact sciences and technology; Fracture mechanics; Materials science; Mechanical and acoustical properties; Metals. Metallurgy; Methods of deposition of films and coatings; film growth and epitaxy; Organic chemistry; Physical properties of thin films, nonelectronic; Physics; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thermal stress; Titanium; Diamonds; Mechanical properties; Iron; Crystal growth from vapors; Solid-solid interfaces; Chromium alloys; Hardness; Experimental study; Wire; Hot wire; Fibers; CVD; Fractures; Nonmetals; Titanium; Fiber core; Steels; Microstructure; Hard coating; Iron base alloys
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1023/A:1018634814881

Diamond fibres were produced in a hot filament reactor by chemical vapour deposition of a 40 μm thick layer of diamond on to titanium-coated iron and iron–chromium wires. In the 40 h deposition time carbon diffused through the titanium and steel and produced carbide microstructures with hardness values of ∼ 3234 and 5390 N mm-2 for the Fe and Fe–Cr cores, respectively. During cooling thermal stress fracture of the diamond was avoided by stress relief cracks in the disordered graphite layer at the diamond/Ti-rich layer interface.