Indlela yokukhiqiza ye-reactive sintering silicon carbide

I-Reaction-sintered silicon carbide iwuhlobo olusha lwe-ceramics yobuchwepheshe obuphezulu, enamandla amakhulu, ukuqina okuphezulu, ukumelana nokugqokwa okuhle nokumelana nokugqwala, futhi isetshenziswa kabanzi kwezensimbi, i-petrochemical, i-electronics, i-aerospace neminye imikhakha. Umkhiqizo one-silicon carbide abrasive auxiliary carbon black, i-graphite nezinye izithasiselo ezihlukahlukene, usebenzisa ukucindezela okomile, ukukhishwa kwe-extrusion noma izindlela zokuthulula ukwenza ikhwalithi ye-porous, bese okulandelayo ndawonye ukuqonda indlela yokukhiqiza ye-reactive sintering silicon carbide!

I-Reactive sintering silicon carbide Ukusungulwa kuwuhlelo lobuchwepheshe oluvuthiwe ngemva kwezinkulungwane zokuhlolwa komsunguli iminyaka eminingi ukuze kuthuthukiswe ifomula yempahla eluhlaza kanye nenqubo yokukhiqiza, ikakhulukazi inqubo eqhubekayo eyingqayizivele yokucwilisa.

Esicelweni soku-1 sokusungulwa, ingxenye yesisindo se-silicon carbide powder yizingxenye ezingu-5~8, i-carbon black iyizingxenye ezingu-0.5-1.5, i-graphite iyizingxenye ezingu-1-1.5, kanti i-binder iyizingxenye ezingu-0.1-0.5. Phakathi kwazo, usayizi wokusanhlamvu we-silicon carbide yizingxenye ze-sic (90-30m) 3-5, sic) 30-0.8m) izingxenye ezingu-2-3. I-methyl cellulose kanye ne-PVA powder ye-gazelle yafakwa enanini elifanele lamanzi 0.1-0.5 izingxenye ngokulandelana, futhi isisombululo esisobala sitholwe ngemva kokushisa.

1. Hlanganisa zonke izinhlobo zezimpushana, izinamathiselo kanye nezixazululo ezilungiselelwe ngokwefomula bese ugovuza kahle.

2, hlanza i-vacuum yesikhunta sokuphonsa, finyelela ku-0.1Mpa, umjovo wengcindezi we-slurry exubile. Ngemva kwesikhathi esithile, i-slurry iyakhululwa futhi okungenalutho kuyakhishwa. Gcina ku-30-70 amahora angu-18-20 ukuze umise.

3. Sika i-billet ngokwezidingo zomdwebo.

4, faka i-reaction sintering billet esithandweni somlilo, engeza isisindo sezingxenye ezingu-1-3 ze-silicon yensimbi, i-vacuum sintering. Inqubo ihlukaniswe izinga lokushisa eliphansi 0-700, ligcinwe amahora angu-3-5; Ukushisa okuphakathi 700-1400, gcina amahora angu-4-6; Gcina ekushiseni okuphezulu kwe-1400-2200 amahora angu-5-7. Yehlisa izinga lokushisa ngaphansi kwe-150 misa isithando somlilo bese uvula isithando somlilo.

5, isihlabathi blasting ukwelashwa ukugaya umkhiqizo surface sililikoni slag, nesihlabathi blasting ukugaya.

6, imikhiqizo yokwelashwa kwe-oxidation esithandweni se-oxidation, amahora angama-24 kuya ku-1350, ukupholisa kwemvelo. Khipha, uhlole futhi ubeke endaweni yokugcina.

Izinto ezisetshenziswayo kanye nengxenye eyamukelwe indlela yokusungulwa ingokwesayensi futhi inengqondo, ukuze okungenalutho kube ne-voidage eyanele futhi okungenalutho kube nokuminyana okungcono; Izinga lokushisa elingcono le-sintering, izinga lokushisa kanye nesikhathi sokubamba kuqinisekisa amandla aphezulu okugoba omkhiqizo. Ukusebenza okuyinhloko kanye nekhwalithi yale ndlela kufinyelele ezingeni eliphezulu lamazwe ngamazwe. Izinkomba zayo eziyinhloko zimi kanje

Ukuqaliswa okuqondile kwe-Reaction sintering silicon carbide

I-Embodiment 1 Indlela yokukhiqiza inqwaba ye-silicon carbide yokusabela-sintered:

1, impahla eluhlaza ukuthatha isisindo okunamathelayo izingxenye 0.3, engeza inani elithile lamanzi isiyaluyalu ngokulinganayo, isisindo 6.8 izingxenye Silicon carbide powder (usayizi kuyizinhlayiyana 90-30m 3.8 izingxenye, 30-0.8m izingxenye 3) , ikhabhoni emnyama ingxenye engu-1, emnyama

2. Lapho uthela, qala uhlanze isikhunta esisetshenzisiwe, uqondanise isikhunta, usilungise ngezixhumi, ukhiphe udaka ethangini ngokucindezela, ugcwalise ithangi nge-nitrogen ye-pressure engu-0.1Mpa, wenze ukuthulula ingcindezi, bese uphushela i-slurry esikhunjini. . Ngemuva kokufinyelela ihora eli-1, i-slurry ikhishwa, futhi ngemva kwamahora angu-6, isikhunta siyasuswa, izinto ezingenalutho zikhishwa, futhi igumbi lokumisa liyomiswa. 30-70, 18-20 amahora ukususa. 3. Lapho ulungisa okungenalutho, qala uhlole ukuthi okungenalutho kuyahlangabezana yini nezidingo zokuklama. Lapho uhlangabezana nezidingo, lungisa okungenalutho ngokomdwebo. Ngemva kokuhlola, thumela ekamelweni lokushisa lokushisa eliphezulu.

4. Ngemuva kokuthi umswakama we-reaction sintering billet ufinyelele ku-1%, uwukhiphe, uhlanze i-billet ngomoya ophefumulayo futhi ukale. Engeza izingxenye ezingu-2.9 zensimbi ye-silicon. I-nitrogen ingaphonswa ku-vacuum sintering. Inqubo ye-Sintering at 700 lokushisa eliphansi amahora angu-4; Izinga lokushisa eliphakathi 1400, amahora angu-5; Izinga lokushisa eliphezulu 2200,6 amahora. Lapho izinga lokushisa lehla amahora angu-12 futhi lifinyelela ku-150, yeka ukusebenza esithandweni somlilo bese uvula isithando somlilo.

5. Ngemva kokuphuma komkhiqizo wokwelapha we-sandblasting, i-silicon standard Chartered ebusweni bayo igaywe futhi igaywe nge-sandblasting.

6. Inhloso yemikhiqizo yokwelashwa kwe-oxidation ukususa ama-oxide akhiqizwa ngesikhathi senqubo yokucwilisa. Umkhiqizo ushisiswe ube ngu-1350 amahora angama-24 esithandweni se-oxidation bese upholiswa ngokwemvelo. Ngemuva kokususwa, ifakwa endaweni yokugcina ngokuhlolwa.

Izinto ezisetshenziswayo kanye nengxenye eyamukelwe indlela yokusungulwa ingokwesayensi futhi inengqondo, ukuze okungenalutho kube ne-voidage eyanele futhi okungenalutho kube nokuminyana okungcono; Izinga lokushisa elingcono le-sintering, izinga lokushisa kanye nesikhathi sokubamba kuqinisekisa amandla aphezulu okugoba omkhiqizo. Ukusebenza okuyinhloko kanye nekhwalithi yemikhiqizo ekhiqizwa yile ndlela ifinyelele ezingeni eliphezulu lamazwe ngamazwe.

Okungenhla kuyindlela yokukhiqiza ye-reactive sintering silicon carbide, uma udinga ulwazi olwengeziwe, sicela ukhululeke ukuxhumana nathi!