Dispersoids stability

Sut86] Sutuff, JA and Rowe, R.G., Rare Earth Oxide Dispersoid Stability and Microstructural Effects in Rapidly Solidified TisAl and TiaAl-Nb, in Rapidly Solidified Alloys and Their Mechanical and Magnetic Properties, B.C. Giessen, D.E. Polk, and A.I. Tbub, Ed.,... 

The typical features of the phase diagram of Al-rare earth alloys are high liquid solubility, low solid solubility of rare earths and relatively low liquidus temperatures. The low diffusivity of rare earths in these alloys is an attractive feature from the point of view of the thermal stability of the dispersoids. 

Following these considerations the Al3Zr intermetallic compounds are used as dispersoids or precipitates in the Al-Al3Zr composite system, rather than the monolithic ones [7, 8], Many previous works have been concentrated on the microstructural stability, mechanical properties and thermomechanical processing of these kind of systems. Some authors have studied the hot formability of the same alloy by demonstrating the microstructural stability of Zr-stabilized aluminum alloy from 300 and 500 °C [7],... 

The structure and physical properties of the thermoplastic vulcanizates (TPE-V) produced in the process of the reactive processing of pol5rpropyl-ene (PP) and ethylene-octene elastomer (EOE) in the form of alloy, using the cross-linking system was analyzed. With the DMTA, SEM and DSC it has been demonstrated that the d5mamically produced vulcanizates constitute a typical dispersoid, where semicrystal PP produces a continuous phase, and the dispersed phase consists of molecules of the cross-linked ethylene-octene elastomer, which play a role of a modifier of the properties and a stabilizer of the two-phase structure. It has been found that the mechanical as well as the thermal properties depend on the content of the elastomer in the blends, exposed to mechanical strain and temperature. The best results have been achieved for grafted/cross-linked blends with the contents of iPP/EOE-55/45%. 

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