Imwe isina-metallic compound inoumbwa nesilicon nenitrogen, silicon nitride (Si3N4) ichiri chepamusoro-soro checeramic zvinhu zvine musanganiswa unokwanisa kuchinjika wemakanika, zvinopisa, uye zvemagetsi. Pamusoro pezvo, kana zvichienzaniswa nemamwe maceramics mazhinji, iceramic inoita zvemhando yepamusoro ine yakadzikira yekuwedzera kweyekupisa iyo inopa yakanakisa kupisa kuvhundutsa.
Features
Nekuda kweiyo yakaderera kupisa kwekuwedzera coefficient, iyo zvinhu ine yakanyanya kupisa yekupisa kuvhunduka uye yakanaka kutsemuka kuoma. Si3N4 workpieces inoshingirira kukanganiswa nekukatyamadzwa. Zvishandiso izvi zvinokwanisa kushivirira tembiricha yekusvika 1400 °C uye haimirire kumakemikari, corrosive effects, uye simbi dzakanyungudutswa dzakaita sealuminium, pamwe nemaasidhi nealkaline solution. Chimwe chinhu ndechekuderera kwayo. Iine density yakaderera ye3.2 kusvika 3.3 g/cm3, iyo inenge yakareruka sealuminium (2.7 g/cm3), uye ine max kubhenda simba re ≥900 MPa.
Pamusoro pezvo, Si3N4 inoratidzirwa nekuramba kupfeka uye inodarika tembiricha yemhando yepamusoro yesimbi zhinji, sekusimba kwekupisa kwepamusoro-soro uye kusagadzikana kwezvinokambaira. Inopa musanganiswa wepamusoro wezvinokambaira uye oxidation kuramba uye inokunda iyo yepamusoro-tembiricha kugona kwehuwandu hwesimbi. Kutenda kune yayo yakaderera kupisa conductivity uye yakasimba kupfeka kuramba, inogona kumirisana neyakaomarara mamiriro mune inonyanya kudiwa maindasitiri maapplication. Uyezve, silicon nitride isarudzo huru kana tembiricha yepamusoro uye yekuremedza zvakanyanya ichidikanwa.
Properties
● Kutyoka kwakanyanya
● Simba rakanaka rokuchinja
● Kunyanya kuderera
● Incredible yakasimba kupisa kuvhunduka
● High kushanda tembiricha mune oxidizing atmospheres
Kugadzira Nzira
Iwo mashanu maitiro akasiyana-siyana anoshandiswa kugadzira silicon nitride-inotungamira kune zvakasiyana zvakasiyana zvekushandisa uye mashandisiro.
SBRSN (reaction-bonded silicon nitride)
GPSN (gasi pressure sintered silicon nitride)
HPSN (yakadzvanywa silicon nitride)
HIP-SN (inopisa yakadzvanywa nesilicon nitride)
RBSN (reaction-bonded silicon nitride)
Pakati pezvishanu izvi, GPSN ndiyo inonyanya kushandiswa nzira yekugadzira.
Mienzaniso Yekushandisa
Mabhora uye Rolling Elements yeChiedza
Nekuda kwekusimba kwavo kukuru kwekutyoka uye yakanaka tribological zvivakwa, silicon nitride ceramics yakanyatsokodzera kushandiswa semabhora uye anotenderedza zvinhu zvechiedza, chakanyanya kurongeka, inorema-basa ceramic kugadzira maturusi, uye zvakanyanya kusimbiswa zvinhu zvemotokari. Pamusoro pezvo, matekinoroji emagetsi anoshandisa zvinhu 'zvakasimba zvekupisa kuvhunduka uye kupikisa kwepamusoro.
High-Temperature Applications
Kunze kwezvo, yakagara ichishandiswa mukupisa-kupisa kwepamusoro. Icho chokwadi chekuti ndechimwe chezvishoma monolithic ceramic zvinhu zvinokwanisa kumirisana nekutyisa kwakanyanya kwekushisa uye tembiricha gradients inogadzirwa nehydrogen/oxygen rocket injini.
Automotive Industry
Parizvino, iyo silicon nitride zvinhu zvinoshandiswa zvakanyanya muindasitiri yemotokari mumashandisirwo einjini zvikamu uye injini yekuwedzera mayuniti, senge turbocharger yekudzika inertia uye yakaderedzwa injini lag uye emissions, anopenya maplugs ekukurumidza kutanga, anopedza gasi ekudzora mavharuvhu ekuwedzera kukurumidza, uye rocker ruoko pads kupfeka gasi injini kudzikisa.
Electronics Indasitiri
Nekuda kweayo akasiyana emagetsi emagetsi, mune microelectronics application, silicon nitride iri kuwedzera kushandiswa se insulator uye kemikari chipingamupinyi mukugadzirwa kwemasekete akabatanidzwa ekurongedza kwakachengeteka kwemidziyo. Silicon nitride inoshandiswa senzira yekufambisa ine yakakwirira diffusion chipingamupinyi kurwisa sodium ions nemvura, zvinova zviviri zvinokonzeresa kukoromoka uye kusagadzikana mumakroelectronics. Mune ma capacitor e analog device, chinhu ichi chinoshandiswawo sechidziviriro chemagetsi pakati pe polysilicon layer.
Mhedziso
Silicon nitride ceramics zvinhu zvekushandisa. Rudzi rwega-rwega rweceramic iyi ine zvinhu zvakasiyana-siyana zvinoita kuti ishande mumasekita akasiyana-siyana. Kunzwisisa akawanda marudzi esilicon nitride ceramics kunoita kuti zvive nyore kusarudza yakanakisa kune yakapihwa application.
