Plate impact tests were carried out on the new composites, which are carbon composite material impregnated with Si and carbon fiber carbon composites. The composite specimens have different orientation, 0°, 45°, 90°, to the impact plane. The spall damage within the target plate was nondestructively detected from the change in the received waves with a digital ultrasonic measurement system. The spall strength of the composites is higher for the large fiber orientation angle.
