Ang Kovar ay ginagamit sa loob ng maraming dekada. Sa kabila ng medyo mahabang kasaysayan nito, maaaring hindi pa narinig ng maraming tao sa labas ng mga larangan ng engineering ang mahalagang haluang ito. Ito ay isang pangkalahatang-ideya ng kovar.
Ang pangalang Kovar ay aktwal na naka-trademark ng isang korporasyon ng Delaware, CRS Holdings, Inc. Ang Kovar ay unang na-patent sa U.S. sa 1936. Ang haluang metal mismo ay gawa sa bakal, nickel, at kobalt.
Ang kakaiba ng Kovar, at sa gayon ang kahalagahan nito, ay mayroon itong koepisyent ng thermal expansion na kapansin-pansing katulad ng borosilicate glass (matigas na salamin) o seramik. Ang koepisyent ng thermal expansion ng haluang ito ay hindi isang aksidente. Si Kovar noon, Sa katunayan, maingat na binuo upang matugunan ang isang tiyak na pangangailangan.
Ang hamon sa pagpapares ng metal sa salamin ay ang bawat isa ay may iba't ibang koepisyent ng thermal expansion. The problem is that as the glass and metal are heated or cooled they expand and contract at different rates and in varying amounts. Consequently, the hermetic seal between metal and glass components may be destroyed, or the glass may be broken, when the two are paired together and there is a change in temperature.
One common, everyday example of the need for an alloy that can be safely paired with glass is light bulbs. A light bulb made with a base that has a different coefficient of thermal expansion from glass would break quickly due to the heat that the bulb produces while in use. Kovar solves this problem because the alloy base and the glass bulb expand and contact at nearly the same rate.
Light bulbs are perhaps the most common example of the use of Kovar, but this alloy is used in many different products. Kovar is also used to manufacture x-ray tubes, microwave tubes, diodes, mga transistor, at higit pa.
Kovar may not be a household name, but this incredible alloy is still used in products in every home.
Eagle Alloys Corporation has been in the metal business for more than 30 taon. We are able to offer solutions to your material needs. Makipag-ugnayan sa amin ngayon to learn more about our products or to place your order.
