Kovar® Metal-Alloy Supplier

About Kovar® Metal and Kovar® Alloys

Kovar® is an alloy made up of 29% nickel, 17% cobalt, .2% silicon, .3% mangga at 53.5% bakal. Kovar® is known for its low coefficient of thermal expansion. Kovar is suitable for uses which require a matched expansion seal between metal and glass parts. Kovar® ay karaniwang salamin pagbubuklod sa industriya ng electronics.

Kovar not only has thermal expansion similar to glass, but its nonlinear thermal expansion curve can often be made to match a glass, thus allowing the joint to tolerate a wide temperature range. Chemically, it bonds to glass via the intermediate oxide layer of nickel(II) oxide and cobalt(II) oxide; the proportion of iron oxide is low due to its reduction with cobalt. The bond strength is highly dependent on the oxide layer thickness and character. The presence of cobalt makes the oxide layer easier to melt and dissolve in the molten glass. A grey, grey-blue or grey-brown color indicates a good seal. A metallic color indicates lack of oxide, while black color indicates overly oxidized metal, in both cases leading to a weak joint.

*Kovar ay isang rehistradong trademark ng CRS Holdings, Inc., isang subsidiary ng Carpenter Technology Corp.
*Pernifer 2918 is a registered trademark of ThyseenKrupp-VDM, Alemanya
*Dilvar P1 is a registered trademark of Imphy Alloys, Pransya
*NILO K is a registered trademark of Special Metals Corporation, USA

*Ang data sa itaas ay para lamang sa mga layuning pang-impormasyon. Eagle Alloys ay hindi maaasahan para sa katumpakan ng mga nilalaman o application na ito. Tapos na bahagi ng mga drowing ay maaaring ipasa sa isang third party para sa outsourcing.