Material Analysis
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Processing Guarantee for PVDF Radiation-Resistant Applications
Problem Phenomenon
【Problem Phenomenon】PVDF parts in nuclear industry and medical irradiation applications show early embrittlement, inconsistent with the radiation resistance claimed in the literature
Cause Analysis
PVDF has excellent γ-ray and irradiation resistance, but the premise is controlled processing heat history; products with molecular weight already lost due to overheating degradation have reduced irradiation resistance reserve and embrittle early in service
Solution
Strictly control processing temperature and residence time for radiation-resistant application parts; perform accelerated aging verification before irradiation service; establish irradiation performance archives for incoming material and processing batches; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The radiation resistance advantage must be premised on low heat history processing, otherwise service life is discounted; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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