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2. Tungsten carbide - Wikipedia

   en.wikipedia.org/wiki/Tungsten_carbide

   Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering [7] for use in industrial machinery,engineering facility,mold industry,cutting tools, chisels, abrasives, armor-piercing ...

3. Tungsten - Wikipedia

   en.wikipedia.org/wiki/Tungsten

   The jewelry industry makes rings of sintered tungsten carbide, tungsten carbide/metal composites, and also metallic tungsten. [76] WC/metal composite rings use nickel as the metal matrix in place of cobalt because it takes a higher luster when polished. Sometimes manufacturers or retailers refer to tungsten carbide as a metal, but it is a ...

4. Zale Corporation - Wikipedia

   en.wikipedia.org/wiki/Zale_Corporation

   The Zale Corporation (best known as Zales) is an American jewelry retailer, incorporated in Delaware in 1993. The principal executive offices are located in Coppell, Texas . [ 4 ]

5. Cemented carbide - Wikipedia

   en.wikipedia.org/wiki/Cemented_carbide

   The first cemented carbide developed was tungsten carbide (introduced in 1927) which uses tungsten carbide particles held together by a cobalt metal binder. Since then, other cemented carbides have been developed, such as titanium carbide, which is better suited for cutting steel, and tantalum carbide, which is tougher than tungsten carbide. [1]

6. Brazil police to formally accuse Bolsonaro of 2022 coup plot ...

   www.aol.com/news/brazil-police-accuse-bolsonaro...

   BRASILIA (Reuters) -Brazil's Federal Police will present on Thursday a formal accusation against former President Jair Bolsonaro in their investigation of an alleged coup conspiracy after he lost ...

7. Sodium tungstate - Wikipedia

   en.wikipedia.org/wiki/Sodium_tungstate

   Sodium tungstate is obtained by digestion of tungsten ores, the economically important representatives of which are tungstates, in base. Illustrative is the extraction of sodium tungstate from wolframite: [1] Fe/MnWO 4 + 2 NaOH + 2 H 2 O → Na 2 WO 4 ·2H 2 O + Fe/Mn(OH) 2. Scheelite is treated similarly using sodium carbonate.