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Gretta

时间: 01-03 12:38 主题：无标题

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1. The Material Science and Industrial Genesis of Tungsten Carbide Wedding Bands
The remarkable properties of a tungsten wedding band originate not from a precious metal but from a sophisticated ceramic-metallic compound known as tungsten carbide （WC） a material forged from the elemental tungsten and carbon atoms.
Tungsten itself which is also called wolfram is a rare chemical element with the highest melting point of any pure element on the periodic table a property that immediately suggests immense strength and heat resistance. However pure tungsten is too brittle for jewelry necessitating its fusion with carbon in a process that yields the composite alloy.

This alloy is then mixed with a binder metal typically corrosion-resistant nickel which acts as a molecular "glue" to hold the super-hard carbide particles together enabling the final product to be shaped and worn. This compound boasts an astounding 9 on the Mohs scale of mineral hardness a metric used to gra

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Katherin

时间: 01-03 12:34 主题：无标题

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Darell

时间: 01-03 12:25 主题：无标题

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Alejandrina

时间: 01-03 12:10 主题：无标题

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lavagame_x

时间: 01-03 11:57 主题：lavagame

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Max

时间: 01-03 11:40 主题：无标题

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Kerry

时间: 01-03 11:29 主题：无标题

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Chu

时间: 01-03 11:22 主题：无标题

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时间: 01-03 11:20 主题：无标题

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时间: 01-03 11:07 主题：无标题

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