Characterization of nickel titanate synthesized by sol–gel processing

• Published in: Thin solid films Vol. 408; no. 1; pp. 104 - 110
• Main Authors: Taylor, D.J., Fleig, P.F., Page, R.A.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 03-04-2002; Elsevier Science
• Subjects: Chemical vapor deposition (including plasma-enhanced cvd, mocvd, etc.); Coatings; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Growth from solutions; Materials science; Mechanical and acoustical properties; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Methods of crystal growth; physics of crystal growth; Methods of deposition of films and coatings; film growth and epitaxy; Nickel titanate; Physical properties of thin films, nonelectronic; Physics; Sol–gel; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Tribology; Tribology and hardness; Nickel titanate; Sol–gel; Coatings; Tribology; Powders; Inorganic compounds; Transition element compounds; Titanates; Nickel Titanates; XRD; Experimental study; Microhardness; Ellipsometry; Dilatometry; Solid lubricants; Crystal growth from solutions; Sol-gel process; Lubricating properties
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/S0040-6090(02)00143-8

Previous studies indicated that oxides of titanium and nickel might be effective solid lubricants. In the current work, we synthesized a range of titanium and nickel oxides including nickel titanate (NiTiO
3) via wet-chemical processing. Coatings and powders made from the sol–gel-derived precursor solutions were characterized by X-ray diffraction, ellipsometry, and pin-on-disk tests. Nickel titanate monoliths were also made by traditional powder processing and characterized by X-ray diffraction, ellipsometry, dilatometry and micro-hardness measurements. These data assisted the characterization of the sol–gel-derived materials. Nickel titanate proved to be a stable oxide at elevated temperatures and exhibited lubricity under certain conditions.