456 KB19 KB200020242014Paulin, Irenaletnik:48številka:6str. 943-947COBISSID:1106346ISSN:1580-2949URN:URN:NBN:SI:doc-BHGABRE9enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeAl alloysAl-zlitineclose-cell foamsfoaming agentspenepenilna sredstvapowder metallurgyprašna metalurgijazaprta poroznostSynthesis and characterization of Al foams produced by powder metallurgy route using dolomite and titanium hydride as a foaming agents| Sinteza in karakterizacija aluminijevih pen, narejenih po postopku prašne metalurgije z uporabo dolomita in titanovega hidrida kot penilnega sredstva|Production of aluminum foams by the powder-metallurgy process depends on the preparation of pre-cursors. In general, pre-cursors consist of compacted mixture of metallic powder and foaming agent, which is foamed at a pre-determined temperature. Due to high temperature of foaming procedure, the foaming agent decomposes into a solid component that is built into the matrix material, and a gas component that causes foaming of the matrix material. Powder metallurgy is a method for making close-cell foams and it is the best selection, especially for the production of net-shape parts, providing excellent quality of end products. In our research work, powders, precursors and foams, made from different metallic powders (Al 99.7 % purity, AlSi12 alloy) with different foaming agents (TiH2, CaCO3, CaMg(CaCO3)2), were examined with different analytical techniquesAluminijeve pene, narejene po postopku prašne metalurgije, so zelo odvisne od priprave prekurzorjev. Ti so narejeni iz stisnjenih prašnih delcev osnovnega materiala in penilnega sredstva ter penjeni pri določeni temperaturi. Zaradi visokih temperatur penilno sredstvo razpade na trdno snov, ki se vgradi v osnovni material, in plin, ki povzroči penjenje osnovnega materiala. Po postopku prašne metalurgije se izdelujejo aluminijeve pene z zaprto poroznostjo. Ta metoda je najbolj primerna za izdelavo kompleksno oblikovanih končnih oblik izdelkov. Pri našem raziskovalnem delu smo z različnimi analitskimi tehnikami raziskali kovinske prahove (Al, čistote 99,7 %, in zlitine AlSi12) in penilna sredstva (TiH2, CaCO3, CaMg(CaCO3)2), prekurzorje ter končne porozne materialeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije