Indlela Yokwenza Amashubhu e-Silicon Carbide: Umhlahlandlela Ophelele

I-Silicon carbide (SiC) iyinto ekhethwayo ezinhlobonhlobo zezicelo zezimboni ngenxa yokuqina kwayo okuvelele, ukuzinza kokushisa, nokumelana namakhemikhali. Phakathi kwezinhlobo zayo eziningi, amashubhu e-silicon carbide aziswa ikakhulukazi ukuqina nokusebenza kwawo ezindaweni ezinokhahlo. Lesi sihloko sizocubungula inqubo eyinkimbinkimbi yokukhiqizaamashubhu e-silicon carbide, egxile ekukhiqizeni amashubhu e-ceramic e-react-sintered silicon carbide.

Ukuqonda i-Silicon Carbide

Ngaphambi kokuthi singene enkambisweni yokukhiqiza, kubalulekile ukuqonda ukuthi iyini i-silicon carbide. I-Silicon carbide iyinhlanganisela ye-silicon nekhabhoni eyaziwa ngezakhiwo zayo ezihlukile. I-semiconductor imelana namazinga okushisa aphezulu, i-oxidation, nokugqwala. Lezi zakhiwo zenza amashubhu e-silicon carbide alungele ukusetshenziswa ezimbonini ezifana ne-aerospace, izimoto, kanye nokucubungula amakhemikhali.

Ukulungiswa kwezinto ezingavuthiwe

Isinyathelo sokuqala sokukhiqiza amashubhu e-silicon carbide ukulungisa izinto zokusetshenziswa. I-silicon powder yekhwalithi ephezulu kanye ne-carbon powder yizimfuneko zokukhiqiza i-high-performance reaction-sintered silicon carbide (RBSC). Ukuhlanzeka kwalezi zimpushana kubalulekile; noma yikuphi ukungcola kuzothinta kakhulu izinga lomkhiqizo wokugcina. Ngaphezu kwalokho, ukusabalalisa usayizi wezinhlayiyana zama-powders kumele kulawulwe ngokucophelela. Usayizi wezinhlayiyana olinganayo uqinisekisa ukuthi okokusebenza kusabela ngokulinganayo phakathi nenqubo ye-sintering, okuholela kumkhiqizo wokugcina ominyene, oqinile.

Izithako kanye Ukuxuba

Uma izinto zokusetshenziswa sezilungisiwe, isinyathelo esilandelayo ukuhlanganisa nokuxuba. Le nqubo ihilela ukulawula ngokunembile isilinganiso se-silicon powder ne-carbon powder. Isilinganiso esifanele sibalulekile ngoba sinquma ukusabela kwamakhemikhali okuzokwenzeka ngesikhathi sokucwilisa. Ukuxuba ngokuphelele izimpushana ukuqinisekisa ukuthi ngisho nokusatshalaliswa kubalulekile ukuze kuzuzwe ukwakheka okungaguquki kwe-silicon carbide. Lesi sinyathelo sibucayi; noma yikuphi ukungqubuzana kwengxube kungase kubangele amaphutha ekugcineni kwe-silicon carbide tube.

Ukwakha umumo wepayipi

Uma inqubo yokuhlanganisa nokuxuba isiqediwe, isinyathelo esilandelayo ukubumba ipayipi. Lokhu kungafezwa ngezindlela ezihlukahlukene, okuhlanganisa ukucindezela okubandayo kwe-isostatic (CIP) noma ukukhipha. I-CIP ihilela ukufaka ingcindezi efanayo kumpushana oxubile edayithini, okuholela ekubumbeni okuhlangene futhi okwakhiwe kahle. Ngaphandle kwalokho, i-extrusion ivumela ukubunjwa okuqhubekayo kwezinto ezibonakalayo, okuwusizo ikakhulukazi ekukhiqizeni amapayipi amade. Ukukhethwa kwendlela yokubunjwa kuncike kusayizi oyifunayo kanye nokucaciswa komkhiqizo wokugcina.

Inqubo ye-Sintering

Inqubo ye-sintering yilapho umlingo kwenzeka khona. Ishubhu le-silicon carbide elakhiwe lifakwa esithandweni sokushisa esiphezulu esilawulwa ngokuqinile isivinini sokushisa kanye nesikhathi sokubamba. Ngalesi sigaba, i-silicon powder kanye ne-carbon powder zisabela ngamakhemikhali ukuze zakhe isakhiwo esiminyene se-silicon carbide. Izinga lokushisa le-sintering ngokuvamile liphakathi kuka-1400°C no-2000°C, kuye ngokuthi ukwakheka okukhethekile nezici ezifiswayo zomkhiqizo wokugcina. Lesi sinyathelo sibalulekile ngoba sinquma amandla emishini nokuzinza kokushisa kweshubhu le-silicon carbide.

Ubuchwepheshe be-post-processing

Ngemuva kokuthi inqubo yokucwilisa isiqediwe, ishubhu ye-silicon carbide ingena ngemuva kokucubungula. Lesi sigaba sihlanganisa ukukhanda imishini nokupholishwa kwendawo ukuze kuhlangatshezwane nezidingo ezinembile zobukhulu kanye nekhwalithi yendawo. Ukukhanda kungase kuhlanganise ukusika, ukugaya noma ukubhoboza ukuze kuzuzwe ubukhulu obudingekayo, kuyilapho ukupholishwa kwendawo kuthuthukisa ubuhle nokusebenza okusebenzayo kweshubhu. Ukucutshungulwa kwangemuva kubalulekile ukuze kuqinisekiswe ukuthi umkhiqizo wokugcina uhlangabezana namazinga emboni kanye nokucaciswa kwamakhasimende.

Izinyathelo Zokulawula Ikhwalithi

Kuyo yonke inqubo yokukhiqiza, sisebenzisa izindlela zokulawula ikhwalithi ukuze siqinisekise ukuthi amashubhu e-silicon carbide ahlangabezana nezindinganiso ezidingekayo. Lokhu kuhlanganisa ukuhlola ukuhlanzeka kwezinto ezingavuthiwe, ukuqapha ukuvumelana kwenqubo yokuxuba, nokuhlola ngesikhathi nangemuva kokucwiliswa. Amasu athuthukile afana ne-X-ray diffraction kanye ne-scan electron microscopy angasetshenziswa ukuhlaziya i-microstructure ye-silicon carbide ukuze kuqinisekiswe ukuthi ihlangabezana nezindinganiso zokusebenza ezidingekayo.

Ukusetshenziswa kwe-Silicon Carbide Tube

Amashubhu e-silicon carbide asetshenziswa ezinhlobonhlobo zezicelo ngenxa yezakhiwo zawo ezinhle kakhulu. Embonini yokucubungula amakhemikhali, asetshenziselwa ukudlulisa uketshezi olubolayo, kuyilapho emkhakheni we-aerospace, asetshenziswa njengezingxenye ezindaweni ezishisa kakhulu. Ngaphezu kwalokho, amashubhu e-silicon carbide asetshenziswa kakhulu ekusetshenzisweni kwamandla, njengama-reactors enuzi kanye nama-turbines egesi, lapho ikhono lawo lokumelana nezimo ezimbi libaluleke kakhulu.

Ngokufigqiwe

Ukukhiqizwa kwamashubhu e-silicon carbide kuyinqubo eyinkimbinkimbi futhi ebucayi edinga ukunakwa ngokucophelela ngemininingwane kuzo zonke izigaba. Kusukela ekulungiseni izinto zokusetshenziswa zekhwalithi ephezulu kuya ekulawuleni okunembile kwenqubo yokucwilisa, isinyathelo ngasinye sidlala indima ebalulekile kwikhwalithi nokusebenza komkhiqizo wokugcina. Njengoba izimboni ziqhubeka nokufuna izinto ezingamelana nezimo ezinzima, isidingo samashubhu e-silicon carbide cishe singakhula, okwenza kubaluleke nakakhulu ukuqonda inqubo yabo yokukhiqiza. Kungakhathaliseki ukuthi asetshenziselwa izinhlelo zokusebenza zezimboni noma ukusetshenziswa okuthuthukisiwe kwezobuchwepheshe, amashubhu e-silicon carbide amelela intuthuko enkulu kusayensi yezinto ezibonakalayo, ehlinzeka ngokuqina nokuthembeka ezindaweni ezihlukahlukene.