Characterization of defects in Mn-Zn ferrites by scanning laser acoustic microscopy (SLAM)
Conference
·
OSTI ID:6409121
A scanning laser acoustic microscope (SLAM) has been used to evaluate the integrity of Mn-Zn ferrite ceramic components which comprise part of the magnetic circuit in an electromechanical code interrogation device. Cracking of the ferrites during processing and assembly emerged as a significant manufacturing problem. Operations such as grinding, metallization, joining, and welding were suspected of causing damage, and acoustic microscopy was used to monitor these processes. Parts which produced suspicious acoustic images were dismantled and destructively sectioned to identify specific physical defects. Correlations between the defects and their acoustic signatures were established. This procedure has provided the basis for several process modifications and improvements which have resulted in acceptable production yields. The SLAM is used as an engineering tool for the detection and characterization of defects and is presently being used routinely to inspect production ferrite components.
- Research Organization:
- Allied Corp., Kansas City, MO (USA). Bendix Kansas City Div.
- DOE Contract Number:
- AC04-76DP00613
- OSTI ID:
- 6409121
- Report Number(s):
- BDX-613-3700; CONF-8706116-1; ON: DE87010677
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
42 ENGINEERING
420500* -- Engineering-- Materials Testing
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACOUSTIC DETECTION
ACOUSTIC MEASUREMENTS
ACOUSTIC MICROSCOPY
CERAMICS
CHALCOGENIDES
CHARGED PARTICLE DETECTION
CRACK PROPAGATION
DEFECTS
DETECTION
ELECTRONIC EQUIPMENT
EQUIPMENT
FERRIMAGNETIC MATERIALS
FERRITES
GAS LASERS
HELIUM-NEON LASERS
IRON COMPOUNDS
LASERS
MAGNETIC MATERIALS
MANGANESE COMPOUNDS
MANGANESE OXIDES
MATERIALS
MATERIALS TESTING
MECHANICAL TESTS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
RADIATION DETECTION
TESTING
TRANSITION ELEMENT COMPOUNDS
VOIDS
ZINC COMPOUNDS
ZINC OXIDES
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
42 ENGINEERING
420500* -- Engineering-- Materials Testing
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACOUSTIC DETECTION
ACOUSTIC MEASUREMENTS
ACOUSTIC MICROSCOPY
CERAMICS
CHALCOGENIDES
CHARGED PARTICLE DETECTION
CRACK PROPAGATION
DEFECTS
DETECTION
ELECTRONIC EQUIPMENT
EQUIPMENT
FERRIMAGNETIC MATERIALS
FERRITES
GAS LASERS
HELIUM-NEON LASERS
IRON COMPOUNDS
LASERS
MAGNETIC MATERIALS
MANGANESE COMPOUNDS
MANGANESE OXIDES
MATERIALS
MATERIALS TESTING
MECHANICAL TESTS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
RADIATION DETECTION
TESTING
TRANSITION ELEMENT COMPOUNDS
VOIDS
ZINC COMPOUNDS
ZINC OXIDES