한국어
학부모민원갑질사례
평범한 선생님은 말을 하고, 좋은 선생님은 설명을 하며, 뛰어난 선생님은 몸소 보여주고, 위대한 선생님은 영감을 준다
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 grade scratch resistance. To put this in perspective, this score places it far above platinum (4.5), titanium (6), and gold (a mere 2.5-3). Only diamond, which scores a perfect 10, is harder and thus capable of scratching it. The historical roots of tungsten carbide lie far from the jewelry industry, initially gaining prominence in specialized industrial applications such as cutting tools, deep-terrain mining equipment, and armor-piercing ammunition, where its extreme tensile strength and wear resistance were paramount. Its eventual migration into the consumer jewelry space in the latter half of the 20th century was a direct result of jewelers recognizing that a material so integral to enduring the world's harshest conditions could be perfectly repurposed as a symbol of an enduring, lifelong commitment. The density of tungsten carbide, combined with its unparalleled hardness, is what allows a ring to withstand virtually all the rigors of daily life without losing its original, mirror-like luster.
of ownership by eliminating the need for routine maintenance or refinishing services.
https://www.tungstenwedding.com/product-category/celtic-tungsten-rings/
==1120 men
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 grade scratch resistance. To put this in perspective, this score places it far above platinum (4.5), titanium (6), and gold (a mere 2.5-3). Only diamond, which scores a perfect 10, is harder and thus capable of scratching it. The historical roots of tungsten carbide lie far from the jewelry industry, initially gaining prominence in specialized industrial applications such as cutting tools, deep-terrain mining equipment, and armor-piercing ammunition, where its extreme tensile strength and wear resistance were paramount. Its eventual migration into the consumer jewelry space in the latter half of the 20th century was a direct result of jewelers recognizing that a material so integral to enduring the world's harshest conditions could be perfectly repurposed as a symbol of an enduring, lifelong commitment. The density of tungsten carbide, combined with its unparalleled hardness, is what allows a ring to withstand virtually all the rigors of daily life without losing its original, mirror-like luster.
of ownership by eliminating the need for routine maintenance or refinishing services.
https://www.tungstenwedding.com/product-category/celtic-tungsten-rings/
==1120 men