QUALITY DIAGNOSTICS
Where defects come from, traced to the process stage that caused them
Nine defect categories. Each covers symptom, root mechanism, process-stage traceability, and design prevention.
Sink Mark
Invisible before sintering - by the time you see it, the cost is already at its highest.
Open the full page D02 · /defects/weld-line/Weld Line
Weld lines are nearly unavoidable in dense hole-array parts - the real question is where they land, and whether they can be moved off the critical area.
Open the full page D03 · /defects/color-stain/Color Stain
Symptom: an abnormal color region on the surface after sintering. Color stains are usually a batch-level issue, not a single-part issue.
Open the full page D04 · /defects/chipping/Chipping
Symptom: localized material loss at an edge, corner, or detail feature - can occur during demolding, handling, or ball-mill polishing.
Open the full page D05 · /defects/pinhole/Pinhole
Symptom: point-like micro-voids on the surface after sintering, typically <0.5mm diameter - most visible on high-gloss parts against a mirror background.
Open the full page D06 · /defects/gamma/Gamma-Sterilization Discoloration
Discoloration after gamma sterilization is normal and doesn't affect mechanical performance - color recovers after a 300°C treatment.
Open the full page D07 · /defects/corner-crack/Corner Cracking
Adding a fillet radius cuts corner cracking by 80% - real drum-drop test data.
Open the full page D08 · /defects/open-frame/Open-Frame Warpage
Open-frame warpage isn't a process failure - it's a green-body density gradient, amplified by geometry with no sidewall constraint.
Open the full page D09 · /defects/hard-surface-impact/The Boundary of High-Impact Hard-Surface Testing
Ceramic failure rates rise noticeably in hard-surface impact testing - a real physical boundary, not a defect.
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