Interfacial reactions and wetting in Al-Mg sintered by powder metallurgy process

• Main Authors: Faisal, Heny, Darminto, Triwikantoro, Zainuri, M.
• Format: Conference Proceeding
• Language: English
• Subjects: ALUMINIUM; ALUMINIUM ALLOYS; Aluminum; BONDING; Butanol; BUTANOLS; COMPOSITE MATERIALS; Data analysis; Densification; DENSITY; Diamond pyramid hardness; Interface reactions; INTERFACES; Interfacial bonding; MAGNESIUM; MAGNESIUM ALLOYS; MAGNESIUM OXIDES; MATERIALS SCIENCE; Metallurgical analysis; MICROHARDNESS; PERT; POWDER METALLURGY; PRESSURE RANGE MEGA PA; SCANNING ELECTRON MICROSCOPY; Shrinkage; Sinter; SINTERING; Sintering (powder metallurgy); Temperature; TEMPERATURE DEPENDENCE; Temperature effects; VICKERS HARDNESS; X-RAY DIFFRACTION; ZINC ALLOYS
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4945471

Was conducted to analyze the effect of temperature variation on the bonding interface sintered composite Al-Mg and analyze the effect of variations of the density and hardness sinter. Research carried out by the base material powders of Al, Mg powder and solvent n-butanol. The method used in this study is a powder metallurgy, with a composition of 60% volume fraction of Al - 40% Mg. Al-Mg mixing with n-butanol for 1 hour at 500 rpm. Then the emphasis (cold comression) with a size of 1.4 cm in diameter dies and height of 2.8 cm, is pressed with a force of 20 MPa and held for 15 minutes. After the sample into pellets, then sintered at various temperatures 300 °C, 350 °C, 400 °C and 450 °C. Characterization is done by using the testing green density, sintered density, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), vickers microhardness, and press test. XRD data analysis done by using X’Pert High Score Plus (HSP) to determine whether there is a new phase is formed. Test results show that the sintered density increasing sintering temperature, the resulting density is also increasing (shrinkage). However, at a temperature of 450 °C decreased (swelling). With the increased sinter density, interfacial bonding getting Kuta and more compact so that its hardness is also increased. From the test results of SEM / EDX, there Mg into Al in the border area. At temperatures of 300 °C, 350 °C, 400 °C, the phase formed is Al, Mg and MgO. While phase is formed at a temperature of 450 °C is aluminum magnesium (Al3Mg2), Aluminum Magnesium Zinc (AlMg2Zn).