Kovar® Metal-Alloy Supplier

About Kovar® Metal and Kovar® Alloys

Kovar® huwa liga magħmula minn 29% nikil, 17% kobalt, .2% silikon, .3% manganiż u 53.5% ħadid. Kovar® huwa magħruf għall-koeffiċjent baxx ta 'espansjoni termali tiegħu. Kovar is suitable for uses which require a matched expansion seal between metal and glass parts. L-użi finali ta 'Kovar® huma ġeneralment is-siġillar tal-ħġieġ fl-industrija elettronika.

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 hija trademark reġistrata ta' CRS Holdings, Inc., sussidjarja ta’ Carpenter Technology Corp.
*Pernifer 2918 is a registered trademark of ThyseenKrupp-VDM, il-Ġermanja
*Dilvar P1 is a registered trademark of Imphy Alloys, Franza
*NILO K is a registered trademark of Special Metals Corporation, L-Istati Uniti

*Id-dejta ta’ hawn fuq hija għal skopijiet ta’ informazzjoni biss. Eagle Alloys mhix responsabbli għall-eżattezza ta 'dawn il-kontenut jew applikazzjonijiet. Tpinġijiet tal-partijiet lesti jistgħu jintbagħtu lil parti terza għall-esternalizzazzjoni.