Содержание
- 2. Presentation program Aim of SEM investigation Investigated materials Condition for specimens Preparation Specimen fixation Replica Examples
- 3. Aim of SEM investigation Materials are investigated for: Mikrostructure determination (SE, BSE, AE, EBSD – Electron
- 4. Analytical SEM JEOL JSM-6610A
- 5. Low vacuum SEM JSM- 5800LV
- 6. Types of specimens for SEM investigation Four types of specimens: 1. Metalic 2. Polymer 3. Biological
- 7. Metalic specimens For current conductive metalic specimens any additional preparation is not necessary. They can be
- 8. Specimens from polymers and composites Polymer specimens must be sputtered by the layer of current conductive
- 9. Biological specimens Living cells, biological tissue, and some organs needs to be specially prepared for the
- 10. Biological specimens Biological specimens must be: Dried, because inside the SEM chamber the material will be
- 11. Flower petals sprinkled by gold
- 12. Samples of powder sputerred by gold
- 13. Biological specimens covered by gold
- 14. Specimen size Specime sizes are limited by dimensions of SEM support table. Typical values are: -
- 15. Specimens embeding Specimens are embeded at epoxy resin for the reason of better mounting and correction
- 16. Specimen embeding „Cold embeding” is suitable for materials sensitive at high temperature and pressure. Special epoxy
- 17. Electrical current conductivity Specimens analyzed by SEM methods must conduct electrical current. If specimen doesn’t conduct
- 18. Specimen preparation Cutting, to obtain dimensions limited by support table disposed inside specimen chamber Cleaning and
- 19. Specimen preparation Grinding, by using special waterproof fine grain grinding papers.
- 20. Specimen preparation Mechanical polishing by using special velvet tissue immersed by diamant paste or water suspension
- 21. Specimen preparation Etching is the last operation necessary for microstructure visualisation. It is realised by application
- 22. Etching reagents
- 23. Etching reagents
- 24. Cross Section Polisher SM-09010 Cross Section Polisher, makes cross section perpendicullar to the specimen surface. It
- 25. Cross Section Polisher SM-09010 Principle of operation .
- 26. Procedura przygotowania próbki
- 27. Specimens cutting Saw equipment for sample precission cutting
- 28. Examples of SEM application Granulated medicine
- 29. Examples of SEM application Paper Cross-section
- 30. Evaporisation / sputerring Is realised for covering the surface specimen by C, Au, Pt or Cu
- 31. Evaporation
- 32. Cathode sputtering
- 33. Specimen fixation Current conductive plasticine Sticky carbon discs
- 34. Specimen fixation Double Scotch tape Silver glue
- 35. Specimen fixed to the holder
- 36. Specimens inside the holder
- 37. Replica The aim is to obtain direct microstructure of construction elements without their cutting or destruction.
- 38. Replica
- 39. Replica
- 40. Extraction replica
- 41. Examples Surface of ceramic powder Cross section of ceramic powder
- 42. Examples Cross section of bone
- 43. Pollen of flowers
- 44. Part of insect head
- 45. Brittle fracture
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