Ferromagnetic materials are materials that can easily be magnetized. The most popular and natural materials that exhibit that property include; nickel, cobalt, iron and their alloys.
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Magnetic particle is useful in detecting surface and near surface discontinuities in ferromagnetic material. It is used in foundry control thru manufacturing processes and can be used to detect fatigue and stress cracks in parts that have been in service. A great source of free information can be found through Iowa State's NDT website. Examples of discontinuities that can be found are - linear cracks , linear inclusions , seams , stringers. KThe key is the part must be ferromagnetic , the indications sought must be linear.
Glass is comprised of silica, which makes up approximately 15% of our planet. Glass occurs naturally wherever silica is heated to very high temperatures, such as a creator. Glass can be produced naturally, but the glass used today is manufactured the same way mother nature would. Heating silica until it melts, and allowing it to cool. The only difference is, people give it shapes that are not naturally found. Glass can be found naturally found in Obsidian. Found near lava different materials melt and form Obsidian
consumer to consumer
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IronNickelCoblatand Alloys
IronNickelCoblatand Alloys
Astatine is an extremely rare chemical element, not found in common materials.
Environmental materials are natural materials found in nature such as wood, sand, rock, etc.
They are sustainable materials.
They are sustainable materials.
They are sustainable materials.
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Uranium - for economical exploitation - exist in mines.But uranium is is a common element in all rocks, all waters, building materials, soils etc.
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Abiotic Factors
One of the hardest substances found in nature is the diamond. One of the strongest man made materials is called graphene.