Wurin da ba na ƙarfe ba wanda ya ƙunshi silicon da nitrogen, silicon nitride (Si3N4) kuma babban kayan yumbura ne wanda ya fi dacewa da gauraya na injina, zafi, da kayan lantarki. Bugu da ƙari, idan aka kwatanta da yawancin yumbura, yumbun babban aiki ne tare da ƙarancin faɗaɗawar zafi wanda ke ba da kyakkyawan juriya na zafin zafi.
Siffofin
Saboda ƙarancin haɓakar haɓakar haɓakar yanayin zafi, kayan yana da juriya mai ƙarfi na thermal sosai da tauri mai kyau. Si3N4 workpieces suna da tsayayya ga tasiri da girgiza. Waɗannan kayan aikin na iya jure yanayin yanayin aiki har zuwa 1400 ° C kuma suna da juriya ga sinadarai, ɓarna, da takamaiman karafa kamar aluminium, da kuma acid da mafita na alkaline. Wani fasalin shine ƙarancin ƙarancinsa. Yana da ƙaramin girma na 3.2 zuwa 3.3 g/cm3, wanda kusan yayi haske kamar aluminum (2.7 g/cm3), kuma yana da ƙarfin lanƙwasa max na ≥900 MPa.
Bugu da kari, Si3N4 ana siffanta shi da tsayin juriya ga sawa kuma ya zarce kaddarorin yanayin zafi na yawancin karafa, kamar ƙarfin zafin jiki da juriya mai rarrafe. Yana ba da ingantaccen haɗin kai da juriya da iskar shaka kuma ya fi ƙarfin ƙarfin zafin jiki na yawancin karafa. Godiya ga ƙarancin ƙarancin zafi da juriya mai ƙarfi, yana iya jure yanayin mafi munin a cikin aikace-aikacen masana'antu masu buƙata. Haka kuma, silicon nitride babban zaɓi ne lokacin da ake buƙatar ƙarfin zafin jiki da nauyi mai yawa.
Kayayyaki
● Babban taurin karaya
● Kyakkyawan ƙarfin sassauƙa
● Matsakaicin ƙarancin yawa
● Ƙarfin juriyar girgiza zafi mai ban mamaki
● Babban zafin jiki na aiki a cikin yanayi mai oxidizing
Hanyar samarwa
Hanyoyi daban-daban guda biyar da aka yi amfani da su don yin silicon nitride - suna haifar da kayan aiki da aikace-aikace daban-daban.
SRBSN (siliconi nitride mai haɗakar amsawa)
GPSN (matsin iskar gas siliki nitride)
HPSN (zafi-matsi silicon nitride)
HIP-SN
RBSN (siliconi nitride mai ɗaure amsa)
Daga cikin waɗannan guda biyar, GPSN ita ce hanyar samarwa da aka fi amfani da ita.
Misalai na Aikace-aikace
Kwallaye da Abubuwan Girgizawa don Haske
Saboda tsananin karyewarsu da kyawawan kaddarorin tribological, silicon nitride yumbu sun dace da amfani da su azaman ƙwallo da abubuwan birgima don haske, madaidaiciyar madaidaiciyar bearings, kayan aikin yumbu mai nauyi mai nauyi, da abubuwan haɓaka motoci masu tsananin damuwa. Bugu da ƙari, fasahohin walda suna amfani da kayan 'ƙarfin juriyar girgiza zafin zafi da juriya mai zafi.
Aikace-aikace Masu Zazzabi
Bayan haka, an daɗe ana amfani da shi a aikace-aikacen zafi mai zafi. Gaskiyar cewa yana ɗaya daga cikin ƴan kayan yumbu na monolithic waɗanda zasu iya jure matsananciyar girgizar zafi da gradients ɗin zafin jiki waɗanda injin roka na hydrogen/oxygen ke samarwa.
Masana'antar Motoci
A halin yanzu, ana amfani da kayan silicon nitride da farko a cikin masana'antar kera motoci a cikin aikace-aikacen sassa na injin da na'urori na injin injin, kamar turbochargers don ƙananan inertia da rage ƙarancin injin da hayaƙi, matosai masu haske don farawa mai sauri, shayewar iskar gas don haɓaka haɓakawa. da rocker pads don injin gas don rage lalacewa.
Masana'antar Lantarki
Saboda bambancin kaddarorin wutar lantarki, a aikace-aikacen microelectronics, silicon nitride ana ƙara amfani dashi azaman insulator da shingen sinadarai a cikin samar da haɗaɗɗun da'irori don amintaccen marufi na na'urori. Ana amfani da Silicon nitride azaman Layer passivation tare da babban shingen yaduwa a kan ions sodium da ruwa, waxannan mahimman dalilai guda biyu na lalata da rashin kwanciyar hankali a microelectronics. A cikin capacitors na na'urorin analog, ana kuma amfani da abun azaman insulator na lantarki tsakanin yadudduka na polysilicon.
Kammalawa
Silicon nitride yumbura kayan aiki ne. Kowane nau'in wannan yumbu yana da fasali na musamman waɗanda ke sa shi amfani a sassa daban-daban. Fahimtar nau'ikan yumburan siliki nitride da yawa yana ba da sauƙin zaɓar mafi kyawun aikace-aikacen da aka ba.
