Micro-nano impact indentation testing device and method based on cyclic refrigeration

A micro-nano impact indentation testing device based on cyclic refrigeration, comprising:

• a linear motor, a drive platform, a piezoelectric stack, a pressure rod, an infrared thermal imaging assembly, a stage, a sliding table and a refrigeration device, wherein,
• the drive platform is arranged on the linear motor and can move towards the stage under the driving of the linear motor;
• the drive platform is further provided with a hinge base, the hinge base is provided with the piezoelectric stack and the pressure rod which are connected, a tip end of the pressure rod is provided with a diamond indenter, so that the pressure rod and the diamond indenter can move towards the stage under the push of the piezoelectric stack, and a force sensor is arranged between the pressure rod and the piezoelectric stack and used to obtain a pushing force applied by the piezoelectric stack to the pressure rod;
• the stage is arranged on the sliding table, a clamp is arranged on a surface of the stage facing the pressure rod, the clamp can stably clamp a to-be-tested sample, the diamond indenter can move to be in contact with the to-be-tested sample, and the stage can move to a position where the to-be-tested sample is over against the tip end of the pressure rod along the sliding table;
• the infrared thermal imaging assembly is arranged on one side of the pressure rod, and an infrared thermal imaging range of the infrared thermal imaging assembly comprises the force sensor, the pressure rod, the to-be-tested sample and the stage;
• the refrigeration device is arranged on one side of the pressure rod and is connected to a pressure rod micro-channel embedded in the pressure rod through a pressure rod inlet cold pipe and a pressure rod outlet cold pipe to form a circulating pipeline, so that the refrigeration device can circulate a refrigerating medium in the pressure rod;
• the refrigeration device is also connected to a stage micro-channel embedded in the stage through a stage inlet cold pipe and a stage outlet cold pipe to form a circulating pipeline, so that the refrigeration device can circulate a refrigerating medium in the stage;
• a cold conduction wire is also provided between the pressure rod and the stage, wherein one end of the cold conduction wire is connected to a position close to the diamond indenter, the other end is connected to a position on the stage close to the to-be-tested sample, so that heat exchange can be performed between the pressure rod and the stage through the cold conduction wire;
• wherein a refrigeration balancer is arranged below the pressure rod, the refrigeration balancer comprises an outer frame, a cold conduction plate, a limiting hanging buckle and a cold storage container, the outer frame is a hollow container at least provided with a set of side openings, at least part of a top surface of the outer frame is the cold conduction plate, the limiting hanging buckle tightly attached to the cold conduction plate is arranged above the top surface, and the limiting hanging buckle can clamp the cold conduction wire on the top surface of the outer frame to keep contact with the cold conduction plate;
• and
• the cold storage container is detachably arranged in the outer frame and is used to completely fill an inner space of the outer frame, at least one side surface of the cold storage container is a transparent observation window, the observation window is positioned at the side opening of the outer frame, a top of the cold storage container is a cold conduction top plate, and the inside of the cold storage container is filled with a phase change material, so that the phase change material can sequentially pass through the cold conduction top plate and the cold conduction plate to implement heat exchange with the cold conduction wire.