Wetting of HIP AlN-TiB2 ceramic composites by liquid metals and alloys

• Published in: Journal of the European Ceramic Society Vol. 25; no. 10; pp. 1797 - 1803
• Main Authors: MATTIA, Davide, DESMAISON-BRUT, Martine, TETARD, Daniel, DESMAISON, Jean
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Oxford Elsevier 2005
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Physics; Solid-fluid interfaces; Structural ceramics; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Technical ceramics; Wetting; Ceramic matrix composite; Liquid solid interface; Ternary alloy; Wetting; Hot isostatic pressing; Braze metal; Ceramic metal contact; Composite material; Non oxide ceramics; Aluminium Nitrides; Liquid metal; Manufacturing; Copper; Silver base alloys; Binary alloy; Copper alloy; Scanning electron microscopy; Contact angle; Experimental study; Adhesion; Structural ceramic; Silver; Corrosion; Titanium boride; Transition metal alloy; Sessile drop method; Aluminum nitride
• ISSN: 0955-2219; 1873-619X
• DOI: 10.1016/j.jeurceramsoc.2004.12.012

A non--oxide ceramic composite family was developed via hot isostatic pressing (HIP) without sintering aids. Fully dense (rhorel > 99%) aluminum nitride--based samples, with titanium diboride as secondary phase, were designed to be electrical discharge machining (EDM) compatible.Wetting experiments via the sessile drop method, in vacuum atmosphere, have been performed on three different grades of an AlN--TiB2 ceramic composite. Contact angle and work of adhesion evolutions with time and temperature were investigated.In the case of non--reactive wetting, both copper and silver showed a non--wetting behavior, as well as Cu /Ag alloys. A wetting behavior was, instead, observed for Cu/Ag/Ti brazing alloys.Reactive wetting was observed in the case of nickel. Corrosion was due to Ni diffusion into the ceramic and dissolution of aluminum--based phases in the metal melt.