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Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing, UT

Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing

Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing

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■ Lead Metaniobate (PBNbO 6 ) crystals are made the similar way as<br />

Barium Titanate<br />

Advantages<br />

It has high internal damping<br />

It gives narrow pulse of ultrasound, which gives good resolution<br />

Disadvantage<br />

It has much less sensitivity than Lead Zirconate Titanate PZT

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