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Thanks for the links. I am trying to get all the info I can before going too far down this route. I wanted to get enough background to be sure it was worth pursuing before getting an NDA and calling in a consultant. The tricky part is finding informatin on small explosions. Everyone seems...

Hello, I'm looking into the feasibility of making and using shaped charges around 1mm in diameter under water. I've been looking into research papers and getting background info, but I was hoping some of you might have some experience or could point me to more appropriate sources of info. I...

The object is to break the stones into small enough pieces to allow them to flow out. The kidney stone approach is a really great comparison, but I wasn't able to find any papers that describe the effectiveness of different frequencies. I did find the following paper that seemed to be along...

I have been doing some work on a project involving the destruction of small(less than 1/4 inch diameter), irregular stones that are obstructing small tubes. One avenue I wanted to explore was using acoustic energy to bash them. I was thinking that some analysis of these stones would be useful...

The formula you posted looks more like Young's modulus (E) than shear modulus (G), in which case you can't use it like you're describing. In my last job I performed many pull tests on LCP dogbone test specimens. I had an axial strain gauge and a transverse strain gauge, which allowed me to...

I have found nothing better for batch file renaming than a nine year old freeware program called Renamer. http://www.albert.nu/Programs/Renamer You can strip out the characters with the Trim function under the edit menu. I have no connection to this program or programmer beyond a grateful...

This still doesn't answer your question about how to protect a regular 3%yttria material, but it's another interesting link which describes the most likely mechanism for the material degradation...

You're not actually removing a protective coating. The soda blasting is roughening the surface, which then looks dull because of the texture. Countertop Magic is a paraffin-containing polish that deposits oil and wax into the texture, making it smooth and shiny again. When you scrape your...

In my former job manufacturing mil-spec hermetic packages we used both the hot-liquid/bubble test and helium testing. Helium testing is not effective with larger leaks, as most of the helium will escape before you transfer the part to the detector. Hence the use of the bubble test, using...

Thanks for the tip on aluminum. I will keep reviewing my options. Your advice was very helpful.

When you say a higher viscosity of grease, what do you mean? I've been trying to understand the relationship - if any - difference between NLGI consistency, base oil viscosity, and the effect of thickeners. The current application involves o-ring lubrication, the majority of which are buna-n...

One of my main projects at my company is to reduce our inventory of adhesives and other chemicals. I've been asked to look at our lubricants and try to cut down on what we use. In particular, I'm comparing Molykote 3452 (fluorosilicone base with ptfe filler) and Parker Super O-Lube...

I haven't been able to find anything that states that EPDM cannot be made ISO compliant, but niether have I found anyone selling it. I did find a lot of articles that were made with EPDM and another material, possibly to combine it's mechanical properties with the biocompatibility of the second...

There are many suppliers who offer USP Class VI EPDM. Will that suit your application? Advantapure molds EPDM and silicone, and they offer materials that are USP IV and ISO 10993. They might be able to help you. http://www.advantapure.com/custom.htm

I was hoping someone could guide me towards information about the toxicology of burnt teflon in the human body (not the lungs). There are hundreds of scientific papers (and thousands of non-scientific rantings) about the inhalation hazards of perfluoroisobutylene, oxygen difluoride etc., but...

The best option would be to contact your stoneware supplier and ask for information on its properties at 1000F. If you're mixing the clay yourself, or if this is a theoretical question, you may need to provide some more detail: 1) by "unchanged" are you referring to physical properties...

Why do you need an epoxy? How about a urethane? http://www.loctite401.com/template/ying/pdf/docs/HYS3173-3182-EN.PDF

You should also look at urethanes if you want a flexible bond. Loctite has a lot of information to help you decide in their adhesive sourcebook. http://henkelcatalogs.henkelna.com/skin/entrymap/entrymap_noanimation.asp

While I'd love to delve into issues of durometer and yield strength, the practical part of me is just going to suggest you look at a product called Plasti Dip. It's a great way to coat metals for grippiness and protection. If you decide to go that way, make sure you use the primer. Otherwise...