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id="ChDivSummary" name="ChDivSummary">Electrocatalysts for oxygen reduction reactions(ORR) and oxygen evolution reactions(OER) are highly crucial and challenging toward the energy storage......
of 0.0005 to 4 K/s. In this range at least two exothermal precipitation reactions were observed: a high temperature reaction in a narrow temperature interval of 450-430 °C, and a low temperature reaction in a broad temperature interval down to about 200 °C. Intensities of both reactions decreased with increasing cooling rate. Quenching from solution annealing with rates up to 1000 K/s......
. The extent of the reaction becomes lager at a higher temperature. Multiple reactions happen during sintering. Ti particles are consumed by the reactions at 1 200 ℃, but the Nb phase still exist. The α-Ti phase still exist after sintering at 1 000 ℃, showing the sintered powder compact may have excellent workability. Key words: TiAl intermetallics; powder metallurgy; elemental powder reactions......