Abstract

A new sensitive heat flow calorimeter combined with a hydrogen reactor was developed. Metal-hydrogen reactions can be investigated in the temperature and pressure ranges 243<or=T<or=353K and 1<or=pH2<or=20 MPa, respectively. The calorimeter permits detection of heats of 10 mJ and is suitable for precise measurements of 50 mJ and more in periods of a few seconds up to some 103 s. In its first application the apparatus has been used to determine differential heats of solution of hydrogen in FeTi at 298K.

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