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Al2O3: Relationship between grain size and density?
Dear Johnrh, Question (1): A representative sample must be obtained of the part, then polished, and etched to reveal grain structure. "fined grain" alumina ceramics need a SEM(scanning Electron Microscope) to image the grain size. You would take a picture of a representative area...- genesis
- Post #2
- Forum: Material engineering general discussion
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ceramic injection blisters help!!!!!!!!!!!
Dear sleeprcmaro, I suggest taking a look at your mixing procedure. Improperly mixed injection molding material will have areas of low and high wax concentrations, which means a not uniform binder removal/burnout. The next thing would be the ceramic particle packing. There are additives you...- genesis
- Post #2
- Forum: Material engineering general discussion
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Electrical Porcelain - Glaze Pinhole Problems
Dear mlyn, Barium and strontium are in the same family but I suspect the strontium carbonate is decomposing differently than barium carbonate. I would check the TGA of both, and in addition verify cleaniness of your surfaces. Then change the firing profile based on TGA curves. Best Regards...- genesis
- Post #2
- Forum: Material engineering general discussion
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Ceramic Springs?
Dear velle, Back in 1994 at the American Ceramic Socity Meeting there was a Japanese Manufacturer that manufacturers ceramic springs at the Vendor displays. The name of the Company was NHK Spring Co., Ltd that made in 1994 silicon nitide springs(both coil springs and flat springs). Their USA...- genesis
- Post #2
- Forum: Material engineering general discussion
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Ceramic Engine Design Help
Contructing an all ceramic engine has been done before. The interest seems to go up and down depending on the price of oil, and other factors. Ceramics are generally weak in tension, and strong in compression. However, there are companies that can manufacture the components for you, and...- genesis
- Post #2
- Forum: Material engineering general discussion
