Principle of Ultrasonic Testing for Polycrystalline Diamond Compact
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author：admin
source：Hiwave
time：2025-01-15
catogory：Industry News
What is Polycrystalline Diamond Compact (PDC)?
Polycrystalline Diamond Compact (PDC) is a high-performance composite ma……
What is Polycrystalline Diamond Compact (PDC)?
Polycrystalline Diamond Compact (PDC) is a high-performance composite material primarily composed of a polycrystalline diamond layer and a tungsten carbide substrate. It possesses extremely high hardness, wear resistance, and thermal conductivity, making it an essential material in modern industries, especially in oil and gas drilling and cutting tools.
What is Ultrasonic Testing (UT)?
Ultrasonic Testing (UT) is a non-destructive testing technique that uses high-frequency sound waves to detect internal defects, structural characteristics, and thickness variations in materials. It is an efficient and reliable testing method widely used in industries, aerospace, energy, and other fields.
Principle of Ultrasonic Testing for Composite Thickness:
Diamond (4.91 g/cm²·s) and tungsten carbide (8.34 g/cm²·s) are materials with significantly different acoustic impedances, creating a distinct interface signal between them. When testing with the tungsten carbide surface facing up, three distinct signals can be observed: the surface of the tungsten carbide, the bonding interface, and the surface of the diamond.
By calculating the time difference between the bonding interface and diamond surface signals, and using the known sound speed of diamond, the thickness of the diamond layer can be determined.
