Ukuqina Okuthuthukile Nge-Reaction Bonded SiC

I-Reaction Bonded SiC (Rbsc) iyinto ehlala isikhathi eside kakhulu esetshenziswa ezinhlelweni eziningi ngenxa yokumelana kwayo nokugqoka okuphezulu nokuzinza kokushisa. Funda kabanzi ngakho lapha!

Ukukhiqizwa okuhlanganisiwe kokusabela kuqala ngokuxuba ndawonye izinto ezihlanganiswe ne-SiC ne-carbon. Uma sekwakhiwe, lo mzimba oluhlaza udlula imishini eluhlaza ukuze uthole ukunemba nokuqedwa kwendawo.

Gqoka ukumelana

I-Silicon carbide igqama njengomunye wabadlali abaphambili uma kukhulunywa ngokumelana nokugqoka, ngenxa yenqubo yokukhiqiza enokwethenjelwa eholela ekubeni nzima, izintambo eziqinile ezingagugi ezibonise ukubaluleka kwazo ezindaweni ezifunwa kakhulu zezimboni.

Inhlanganisela Yensimbi Engagqwali Esebenzayo Esebenzayo (Rbsc), kudalwe ngenqubo yokuhlangana yokusabela emisha lapho i-silicon encibilikisiwe ifakwa khona ku-porous carbon preform, ivumela i-RBSC ukuthi igcine ukwakheka kwayo emazingeni okushisa aphezulu kuyilapho isazwakala kahle ngokwesakhiwo futhi imelana nokugqwala kwe-acids.. Ngaphezu kwalokho, izinga layo lokukhula okushisayo liphansi kakhulu futhi ukumelana nokugqwala nakho kufakazelwe.

I-SiC yaziwa kabanzi ngobulukhuni bayo, ukumelana nokugqoka, ukushisa nokuguguleka kwamakhemikhali njengento esetshenziselwa izimpawu zemishini kanye nezingxenye zephampu ezisebenza kahle kakhulu. Kuya ngebanga layo, I-SiC futhi inamandla amahle kakhulu okuguquguquka emazingeni okushisa okusetshenziswa aphakeme kanye namandla amahle okunyakazisa – izici eziyenza ifanelekele izinhlelo zokusebenza lapho ukudlidliza nokushaqeka kungase kwenzeke.

Ukumelana Nokushisa

Ukumelana nokushisa okuphezulu kwe-RBSC kuyenza ibe umholi ekufuneni izicelo zezimboni, ukuqeda ukushisa ngendlela efanele ukuze kuvunyelwe ukusetshenziswa kwayo ezindaweni ezishisayo ngaphandle kwezidingo ezengeziwe zokuphumula nezokugcina.

Ukuphendula ngesibopho se-silicon carbide (Rbsc) ikhiqizwa ngama-compact compacts afakwe ngezingxube ze-SiC ne-carbon ene-silicon ewuketshezi, lapho ukusabela kwayo ngekhabhoni kuphumela ekwakhekeni kwe-silicon eyengeziwe ehlanganisa izinhlayiya zokuqala ze-SiC ndawonye – ngokungafani ne-Sintered SiC ekhiqizwa ngezinqubo ezivamile zokwakheka kwe-ceramic kusetshenziswa izinsiza ezingezona i-oxide sintering.

Ucwaningo lukaSong luphakamisa ukuthi ukufakwa kwesandulela esiyinhlanganisela kukhulisa okuqukethwe kwe-SiC ngokulawula ukusabela phakathi kwe-silicon ewuketshezi ne-amorphous carbon., ukususa izenzakalo zokuvala izimbotshana, futhi ikhiqiza i-RB-SiC eminyene enemodulus ephezulu namandla – ukukhiqiza i-RBSC eminyene ngenhlanganisela yamandla esakhiwo, ukumelana kwamakhemikhali, ukubekezelelana kwezinga lokushisa nokumelana nokugqoka – okwenza i-RBSC ibe indaba yakusasa. Ngaphezu kwalokho, le nto ephikisayo inokuqina okumangalisayo ezindaweni zokugqokwa okuphezulu kanye nokumelana nokuguguleka okuphakeme kanye nokuzinza kokushisa okushisayo. – okwenza i-RBSC ibe indaba yakusasa.

Ukumelana Kwamakhemikhali

I-Reaction Bonded SiC iyimpahla yobumba eqinile futhi eqinile, eyaziwa ngokuba yi-inert amakhemikhali futhi imelana ne-oxidation nokugqwala. Iyakwazi ukumelana namazinga okushisa aphezulu ngenkathi isaqinile, I-Reaction Bonded SiC yenza izingxenye ezifanele kuzilungiselelo zezimboni njengamaphampu, ama-nozzles, ama-bearings, ukuminyanisa kokulawula ukugeleza nokunye okunjalo.

Ukwenziwa kwe-RB SiC kuhlanganisa ukujova i-silicon ewuketshezi entweni eyi-porous carbon epakishwe esimweni sayo sokugcina kusetshenziswa ukungena okuncibilikayo okusebenzayo. (I-RMI). Le nqubo iqinisekisa ama-pores e-carbon clogs amancane asele, futhi ivumela i-silicon encibilikisiwe ukuthi isabele nekhabhoni ukuze yakhe i-silicon carbide [1, 2].

I-silicon carbide ehlanganisiwe inikezela nge-thermal conductivity ehlukile, i-coefficient ephansi yokwandisa, kanye nokumelana nokushaqeka okushisayo, i-oxidation kanye nokugqwala; ukwenza kube ukukhetha okuhle kakhulu kwemishini yokucubungula i-semiconductor njengamashalofu omlilo nefenisha noma izinsimbi. Ngaphezu kwalokho, izakhiwo zayo ezingasindi namandla kuyenza ibe wusizo ezintweni zezempi noma zasemkhathini njengamapuleti ezikhali noma imibhobho yerokhethi.

I-Thermal Shock Resistance

Ukumelana nokushaqeka okushisayo kwezinto kungalinganiswa ngokukwazi kwabo ukubekezelela ukucindezeleka ngaphansi kwezinguquko ezisheshayo zokushisa, kuye ngesakhiwo sabo, izakhiwo kanye nemvelo. Ukucindezeleka okunjalo kungabangela imifantu, ama-deformation noma ama-fractures ngaphakathi kwezakhiwo zawo, izakhiwo noma izindawo – okubangela izinkinga ezingase ziqhekeke ngokwesibonelo.

I-Reaction Bonded Silicon Carbide inesakhiwo esiyinkimbinkimbi se-lattice samabhondi phakathi kwe-carbon nama-athomu e-silicon esinikeza amandla abalulekile emishini., high conductivity ezishisayo kanye kwabantu low – izimfanelo ezinomthelela ekumelaneni kwayo nokushaqeka okushisayo okuvelele.

Ukumelana nokushaqeka okushisayo kwezinto kuncike ezintweni eziningi, okuhlanganisa izinga lokuqala lokuqhekeka kanye nesivinini sokusabalalisa, ubude be-crack kanye nezimo zayo zokuqala. Impahla ye-RBSC inamandla okugcina amanani aphezulu engcindezi yokuqhekeka ngenkathi imelana nezindlela ezahlukahlukene zokulimala – kusuka emifantwini ye-matrix eyakha ngaphakathi kwezimbotshana phakathi kwezibopho zefiber ukuya emifantwini emise okwezimbotshana ezimbotshana – ngaphandle kokuhlupheka ukuwohloka okukhulu noma ukwakheka kwemifantu.