Interfacial reaction wetting in the boron nitride/molten aluminum system

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(93)90111-5· OSTI ID:6186339

Fujii, H; Nakae, H; Okada, K ^[1]

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1. Waseda Univ., Tokyo (Japan). Dept. of Materials Science and Engineering

An improved sessile drop technique which prevented the oxidation of aluminum was used to measure the changes in contact angle between boron nitride and molten aluminum in a purified He-3% H[sub 2] between 1,173 and 1,373 K. The contact angle progressed through the four wetting phases similar to other ceramics when the results were plotted on a logarithmic time scale. However, at and above 1,273 K the equilibrium contact angle was 0[degree] which is much less than those of typical ceramics. Using the value in phase II, the original contact angle between boron nitride and aluminum (contact angle between non-reacted boron nitride and aluminum) was estimated to be 133[degree] at 1,373 K. The wetting progressed by producing another non-wetting material, AlN, in this non-wetting system. The detailed mechanism of the solid/liquid/vapor interfacial advance during wetting in such a system was also explained using Cassie's equation.

• OSTI ID: 6186339
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 41:10; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALLOYS
ALUMINIUM ALLOYS
BORON COMPOUNDS
BORON NITRIDES
COMPOSITE MATERIALS
INTERFACES
MATERIALS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SURFACE PROPERTIES
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
WETTABILITY