Ikhompawundi engeyiyo isinyithi eyenziwe ngesilicon kunye nenitrogen, isilicon nitride (Si3N4) ikwayimathiriyeli yeceramic ephucukileyo enomxube oguquguqukayo womatshini, i-thermal, kunye neempawu zombane. Ukongeza, xa kuthelekiswa noninzi lwezinye iiseramikhi, yi-ceramic esebenza kakhulu enomthamo ophantsi wokwandiswa kwe-thermal enika ukuxhathisa ukothuka kwe-thermal.

Iimbonakalo

Ngenxa yokwandiswa kwe-thermal coefficient ephantsi, izinto eziphathekayo zinokuxhathisa ukothuka okuphezulu kwe-thermal kunye nokuqina okuhle kokuphuka. Izixhobo zokusebenza zeSi3N4 ziyaxhathisa iimpembelelo kunye nezothuso. Ezi zixhobo ziyakwazi ukumelana namaqondo obushushu okusebenza ukuya kuthi ga kwi-1400 °C kwaye ayazimelana neekhemikhali, i-corrosive effects, kunye neentsimbi ezithile ezinyibilikisiweyo ezifana ne-aluminiyam, kunye neeasidi nezinyibiliko zealkaline. Olunye uphawu kukuxinana kwayo okuphantsi. Inoxinano oluphantsi lwe-3.2 ukuya kwi-3.3 g/cm3, ephantse yalula njenge-aluminiyam (2.7 g/cm3), kwaye inamandla okugoba aphezulu ≥900 MPa.

Ukongeza, i-Si3N4 ibonakala ngokuxhathisa okuphezulu ukunxiba kwaye yodlula iimpawu zobushushu obuphezulu besinyithi ezininzi, njengamandla obushushu obuphezulu kunye nokuxhathisa ukurhubuluza. Inika umxube ogqwesileyo wokuxhathisa kunye ne-oxidation kwaye igqithise izakhono zobushushu obuphezulu kuninzi lwesinyithi. Ngombulelo kwi-conductivity yayo ephantsi yokushisa kunye nokumelana okunamandla okunxiba, inokumelana neemeko ezinzima kakhulu kwizicelo ezifunwa kakhulu zoshishino. Ngaphezu koko, i-silicon nitride lukhetho olukhulu xa ubushushu obuphezulu kunye nesakhono somthwalo ophezulu sifuneka.

Iipropati

● Ukuqina kokwaphuka okuphezulu

● Ukomelela kakuhle

● Uxinzelelo oluphantsi kakhulu

● Ukumelana nokothuka okumangalisayo kwe-thermal

● Ubushushu obuphezulu bokusebenza kwi-oxidizing atmospheres

Indlela yokuvelisa

Iinkqubo ezintlanu ezahlukeneyo ezisetyenziselwa ukwenza i-silicon nitride-zikhokelela kwizinto ezahlukeneyo zokusebenza kunye nokusetyenziswa.

• I-SBRSN (i-silicon nitride ye-reaction-bonded)

• GPSN (uxinzelelo lwerhasi sintered silicon nitride)

• I-HPSN (i-silicon nitride ecinezelwe ngokushushu)

• HIP-SN (isilicon nitride eshushu isostatically icinezelwe)

• I-RBSN (i-silicon nitride yokusabela)

Phakathi kwezi zintlanu, i-GPSN yeyona ndlela isetyenziswa rhoqo kwimveliso.

Imizekelo yosetyenziso

Iibhola kunye ne-Rolling Elements yokukhanya

Ngenxa yokuqina okukhulu kokwaphuka kunye neempawu ezintle ze-tribological, iiseramics ze-silicon nitride zikulungele ukusetyenziswa njengeebhola kunye nezinto eziqengqelekayo zokukhanya, iibheringi ezichane kakhulu, izixhobo zokwenza i-ceramic enzima, kunye nezinto ezinoxinzelelo olukhulu lweemoto. Ukongeza, iindlela zokuwelda zisebenzisa izixhobo eziqinileyo zokuxhathisa ukothuka kwe-thermal kunye nokumelana nobushushu obuphezulu.

Izicelo zobushushu obuphezulu

Ngaphandle koko, kudala isetyenziswa kwizicelo zobushushu obuphezulu. Into yokuba yenye yezinto ezimbalwa ze-monolithic ceramic ezinokumelana nokutshatyalaliswa okugqithisileyo kwe-thermal kunye ne-gradients zobushushu eziveliswa yi-hydrogen / i-oxygen rocket injini.

Ushishino lweemoto

Okwangoku, imathiriyeli ye-silicon nitride isetyenziswa ikakhulu kushishino lweemoto kwizicelo zamacandelo enjini kunye neeyunithi ze-injini, ezinje nge-turbocharger ye-inertia esezantsi kunye nokuncipha kwe-injini kunye nokukhutshwa, iiplagi ezikhanyayo zokuqalisa ngokukhawuleza, ukukhupha iivalvu zokulawula igesi ukonyuka kwesantya, kunye ne-rocker arm pads ukuthoba iinjini zegesi.

Ishishini le-Electronics

Ngenxa yeempawu zayo zombane ezahlukileyo, kwizicelo ze-microelectronics, i-silicon nitride isetyenziswa ngakumbi njengesithintelo kunye nesithintelo sekhemikhali kwimveliso yeesekethe ezidibeneyo zokupakishwa ngokukhuselekileyo kwezixhobo. I-Silicon nitride isetyenziswa njengomaleko wokudlula onesithintelo esiphakamileyo sokusasazwa ngokuchasene ne-sodium ion kunye namanzi, abangoonobangela ababini abaphambili bomhlwa kunye nokungazinzi kwi-microelectronics. Kwi-capacitors yezixhobo ze-analog, into iphinda isetyenziswe njengesithinteli sombane phakathi kwe-polysilicon layers.

Ukuqukumbela

I-silicon nitride ceramics zizinto eziluncedo. Uhlobo ngalunye lwale ceramic luneempawu ezizodwa eziyenza ibe luncedo kumacandelo awohlukeneyo. Ukuqonda iintlobo ezininzi ze-silicon nitride ceramics kwenza kube lula ukukhetha eyona ilungileyo kwisicelo esinikiweyo.