TY - T1 - Ultrasound in Characterization of Rocks and Ceramics and in Crystallization Control SN - / UR - http://hdl.handle.net/10138/321652; URN:ISBN:978-951-51-6868-9 T3 - A1 - Lassila, Ilkka A2 - PB - Helsingin yliopisto Y1 - 2020 LA - en AB - Deep continental drilling is a fundamental tool for obtaining detailed information about the composition, structure and physical conditions of the Earth’s crust. A drill hole allows direct access to rock under in situ conditions and retrieval of core samples that can be investigated in laboratory. In order to get reliable estimates for geophysical properties of rock samples, the seismic velocity measurements should be performed under pressure. An apparatus was built that could be used to determi... VO - IS - SP - OP - KW - fysiikka N1 - PP - ER -