Kwallan yumbu suna ba da kyawawan halaye don aikace-aikacen da aka fallasa ga sinadarai masu tsanani ko yanayi mai tsananin zafi. A cikin aikace-aikace kamar famfunan sinadarai da sandunan rawar soja, inda kayan gargajiya suka gaza, ƙwallayen yumbu suna ba da tsawon rai, rage lalacewa, da yuwuwar aiki mai karɓuwa.
Alumina Ceramic Balls
Saboda mafi girman juriya na lalata da halayen zafin aiki mai girma, alumina oxide (AL2O3) sanannen zaɓi ne don ƙwallon yumbu. Kayan aikin sarrafawa suna amfani da ƙwallan alumina oxide don haɓaka aikin haɓakawa. Idan aka kwatanta da takwarorinsu na ƙarfe, ƙwallayen alumina oxide sun fi nauyi, ƙwanƙwasa, santsi, mafi ƙarfi, juriya, suna buƙatar ƙarancin lubrication, kuma suna da ƙaramin haɓakar thermal, ƙyale ɗaukar nauyi yayi aiki cikin sauri mafi girma da yanayin aiki tare da ƙarancin ƙarfi. Ana amfani da ƙwallan yumbura alumina a ko'ina a cikin mai, sinadarai, taki, iskar gas, da masana'antun kare muhalli a matsayin masu kara kuzari a cikin injin da ke rufe kayan tallafi da tattara hasumiya.
Zirconia Ceramic Balls
Abu ne mai ƙarfi wanda ke aiki da kyau a yanayin zafin da ya kai 1000°F (538°C) kuma yana aiki yadda ya kamata a cikin yanayi gami da narkakken karafa, abubuwan kaushi na halitta, caustics, da galibin acid. Ana amfani dashi akai-akai azaman bawul ɗin bincike don sarrafa kwararar ruwa saboda kyakkyawan juriya ga ƙura da lalata.
Silicon Nitride Ceramic Balls
Kwallan yumbu da aka yi da silicon nitride (Si3N4) akai-akai ana amfani da su a cikin bearings saboda ƙaƙƙarfan juriyar zafinsu da ƙarancin gogayya. Hakanan ana amfani da su akai-akai a fannonin da suka haɗa da kayan aikin ƙarfe, injin turbin gas, sassan injin mota, cikakkun abubuwan yumbu, sojoji da tsaro, da sararin samaniya.
A cikin aikace-aikacen da ke buƙatar babban jujjuyawar saurin sauri, cikakkun yumbura da yumbun bearings ɗin matasan yumbu suna amfani da ƙwallan silicon nitride. Silicon nitride yana da yawa wanda bai wuce rabin na ƙarfe ba, yana rage ƙarfin centrifugal yayin jujjuyawa, wanda ke ba da damar haɓaka saurin aiki.
Ba su da wutar lantarki kuma sun dace da aikace-aikace kamar igiyoyin wutar lantarki don injin AC da DC da janareta. Silicon nitride ball bearings suna da sauri zama ma'aunin masana'antu a cikin samar da injinan lantarki don motocin lantarki da marasa direba.
Ingantacciyar siliki nitride mara magnetic ta sanya ta zama cikakkiyar kayan don amfani a aikace-aikacen da dole ne suyi tsayayya da filin maganadisu. Filin maganadisu ko jujjuyawar juzu'i na iya damuwa idan an yi amfani da ƙwallan ƙarfe a wasu aikace-aikace. Inda filayen maganadisu ke nan, ƙwallan silicon nitride sun fi dacewa don amfani da kayan aikin masana'anta da kayan aikin likitanci.
