Originally Posted by
carpediemracing
Fiberglass is a cheap but relatively strong thread. Carbon fiber is even stronger. Problem is that it shatters, so builders will use the flexy kevlar/aramid to keep the pieces together, sort of like safety glass uses plastic to keep the glass shards more together in a broken safety glass window.
On a side note, I asked him about titanium since he designed a plant to purify titanium. I asked him if the metal was being used for "cool" things (to a boy anyway) like jets, cars, and superlight metal things.
"Paint pigment".
They purify titanium then burn it into ash. Pure white ash - white paint pigment. The alternative was lead based so now they use Ti instead. Seemed like such a pity, burning thousands of tons of Ti into white ash but then again, people want their white paint.
Good post, but I will kinda clarify the bold part. Window glass and fiberglass is essentially the same thing (chemically) however, fiberglass is flexible. Take housing insulation which is just fiber glass. Take a thread out and try and break it by flexing it. You won't because the internal radius does not create a large enough bending moment to exceed its flexural strength so it won't break. Carbon is the same way. Pencil lead which is just graphite snaps like dry pasta, but when you reduce the radius to the size the use as fiber reinforcements, it won't break by trying to bend it.
When it breaks, it is the matrix (in most CFRP, its epoxy) that holds the pieces together. Aramid Fibers do have different properties include a higher theoretical tensile strength, more elongation, ect, but they are not the ONLY thing keeping the broken pieces together. Carbon composite materials are laid up in several different directions and in many times, with different types of fibers to meet design requirements. Since they all have a different orientation, and many times, different mechanical properties, the layers will not always fail at the same time. I am assuming this is what your trying to say
As for Titanium dioxide, most of the titanium we use in the world is in some type like this form (there are a few different variants of titanium dioxide that differ in the way their unit cell is organized) Because of its properties of being pure white, it is used a lot in suntan/block lotions, and as you said, pigments for many things, including OREO cookies. The cream has to be white right. (the chocolate cookie part has carbon black in it to make them more dark)