HARDNESS MEASURING METHOD OF SPHERICAL PARTICLE

摘要

PROBLEM TO BE SOLVED: To measure the yield stress of a spherical particle with a dimension of several tenμm or below with higher precision. SOLUTION: The spherical particle B being a measuring target is arranged and held between a lower compression part 102 and an upper compression part 103, a load applying part 107 is operated to displace the upper compression part 103 in the direction of a stage 101 and the spherical particle B is crushed. At this time, the operation of the load applying part 107 is controlled by a load control part 108 so that the load measured by a load detection part 106 reaches a set value (load F). Next, the displacement quantity of the upper compression part 103 is measured by a displacement measuring part 105 and this measured value is set to the height (h) of the particle after deformation. By this constitution, the effective yield stressσyof the spherical particle being the measuring target is calculated using the obtained particle size D, the load F and the height (h) of the particle and the calculated effective yield stressσyis set to the hardness of the spherical particle. COPYRIGHT: (C)2008,JPO&INPIT