The use of Fe-Al intermetallic compound coatings has been investigated in order to improve the tribological behaviour of carbon tool steel. The coatings were formed by a pack cementation process and subsequently diffusion annealing at 900˚C in an argon controlled atmosphere. The optimum diffusion time was selected on the basis of optimum thickness and tribological behaviour.&#10The microstructu...

AB,-type intermetallic compounds were prepared by induction melting and melt spinning. The composition of a stoichiometric compound LaNi,,,Co,.,Mn,,,Al,.~ with a hexagonal CaCu, structure was varied by &i&&metric and nonstoichiometric addition of Si and B. Discharge capacity is increased considerabdy by addition of silicon in the range of 0.5-5 at% with a maximum value at about 1%. The highest ...

Abstract: Localized corrosion of aluminum alloys is often triggered by intermetallic particles, IMP’s. To understandthe role of IMP’s in corrosion initiation of EN AW-3003, efforts were made to combine nano-scale ex-situ analysis ofthe IMP’s by SEM-EDS, SKPFM and in-situ AFM monitoring of the localized attack in chloride containing solution.The results showed that two distinct types of eutectic...

Fe-Al intermetallic alloys with aluminum content over 60 at% are in the area of the phase equilibrium diagram that is considerably less investigated in comparison to the high-symmetry Fe₃Al and FeAl phases. Ambiguous crystallographic information and incoherent data referring to the phase equilibrium diagrams placed in a high-aluminum range have caused confusions and misinformation. Nowadays une...

In this work, Al-20Si-10Fe-6Cr and Al-20Si-10Fe-6Mn (wt %) alloys were prepared by a combination of short-term mechanical alloying and spark plasma sintering. The microstructure was composed of homogeneously dispersed intermetallic particles forming composite-like structures. X-ray diffraction analysis and TEM + EDS analysis determined that the α-Al along with α-Al15(Fe,Cr)₃Si₂ or α-Al15(Fe,Mn)...

The austenitic stainless steel was coated by dipping into a molten Al-12.4%Si alloy at 765oC. The effect of immersion times in the range of 60 to 900 s was investigated with respect to the phase nature, thickness, and microhardness. An uniform layer (~12 m) of Al12(Fe,Cr)3Si2 intermetallic with hexagonal crystalline structure is formed, irrespectively the immersion time. Microhardness of the c...

• Solidification of Al-5wt%Fe alloys was monitored via high-speed synchrotron tomography. Formation dynamics Al 13 Fe 4 intermetallics were revealed. Hole-like defects filled with aluminium melt observed within the intermetallics. Oriented particle attachment as a potential growth hypothesis proposed. High-speed tomography used to investigate nucleation and intermetallic during solidification a...