Выпуски

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2011

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том 9 / 

выпуск 4

 



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Г. Є. Монастирський, Д. О. Сірий*, А. В. Гільчук*, В. І. Коломицев, Ю. М. Коваль
«Виготовлення методами порошкової металургії пін зі стопів з пам’яттю форми системи Сu–Al–Ni »
979–989 (2011)

PACS numbers: 61.43.Gt, 61.72.Qq, 62.20.fg, 81.05.Rm, 81.07.Wx, 81.20.Ev, 82.70.Rr

In a given work, the possibility of obtaining metallic foams of the shape-memory materials is studied. Cu–Al–Ni-based alloy experiencing the martensitic transformation is chosen as a model material. Metallic foam is prepared by removing ‘swap’ of particles from the compacted mixture of metallic-powder composition Cu–27.6Al–3.6Ni–0.5Ti–0.25Cr at.% and urea. Sizes of spherical powder particles are of 1–50 microns, the size of the swap particles of urea (balls) is about 1 mm. Urea is re-moved either by thermal decomposition at 150–450?C, or the dis-solution and subsequent leaching with water. The samples ob-tained are of the closed or open porosity, depending on the method of eliminating the ‘swap’ of particles. Some samples are annealed at the temperature of 750–1065?C to form a mechan-ical bond between the particles. As a result, samples of metal-lic foams of cylindrical shape are analysed by the scanning electron and optical microscopies.

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