Lapho amasampula e-izitsha zobumba ze-silicon carbide ezinezimboboNjengoba zibonwe okokuqala elabhorethri, izakhiwo ezifana noju lwezinyosi ezivezwe ngaphansi kwe-microscope ye-electron zazibukeka njengendlu yezinyosi ekhuliswe izikhathi eziyizigidi. Lokhu okukhethekile okunezimbobo ezingu-15-60% kuhamba buthule kusuka emakamelweni okushisa ezinjini zezindiza kuya ekuphileni kwethu kwansuku zonke.
Ku-turbine yegesi ku-1600℃, izinto ezivamile seziphenduke insimbi encibilikisiwe isikhathi eside, kodwa i-silicon carbide enezimbobo igcina ukuzinza okumangalisayo. Ngonyaka odlule, lapho evakashela i-Shanghai Institute of Ceramics ye-Chinese Academy of Sciences, umcwaningi wabonisa ukuhlola okuthakazelisayo: ukubeka ishidi le-silicon carbide elinezimbobo elangeni le-oxygen-acetylene (cishe ama-3000℃), i-thermometer ngemuva yabonisa ukuthi ikhuphuke ngo-72℃ kuphela. Lokhu kumelana nokushisa okutholakala esakhiweni sekristalu se-β-SiC kwenza kube "yisivikelo esingabonakali" sohlelo lokuvikela ukushisa lwemikhumbi-mkhathi. Okungcono nakakhulu, lawo ma-pores anobukhulu be-micron afana nama-chimney amancane angenakubalwa, kunciphisa ukusebenza kahle kokushisa ngo-40-60% uma kuqhathaniswa nama-ceramic aqinile.
Mhlawumbe ngisho nososayensi bezinto zokwakha babengalindele ukuthi lolu hlobo lwe-ceramic, olwaklanywa ekuqaleni ukuze lusetshenziswe ezindaweni ezibucayi, luzobhekana nentwasahlobo yesibili emkhakheni wezokwelapha. Ucwaningo lwezokwelapha olwanyatheliswa kuyi-Journal of Biomaterials ngo-2024 lubonisa ukuthi izicabha ze-silicon carbide ezinezakhiwo zobukhulu be-pore gradient (5μm ebusweni kanye no-200μm phansi) zinezinga lokuhlanganiswa kwamathambo eliphindwe izikhathi ezingu-2.3 kunele-titanium alloy implants yendabuko.
Inqubo yokulungisa i-silicon carbide enezimbobo ngokwayo iwumlingo wamakhemikhali. Ngendlela yokwenza i-pore-forming agent (ngokuvamile i-polymethyl methacrylate microspheres) noma indlela yokususa ukusabela, onjiniyela bezinto ezibonakalayo bangalawula ngokunembile izici ze-pore njengabapheki bamakha. Ngokuthakazelisayo, ilungelo lobunikazi lakamuva le-3M Company e-United States libonisa ukuthi ukusebenzisa i-diatomite ephinde yasetshenziswa njengesifanekiso semvelo akugcini nje ngokunciphisa izindleko zokukhiqiza ngo-18%, kodwa futhi kungalindelekile kuthola isakhiwo se-bionic esifana namathambo e-coral. Le ndlela "yokuguqula imfucuza ibe yingcebo" ihambisana kahle nokuhlakanipha kwamaTao "kokusebenziseka kwabangenamsebenzi".
Isicelo
- Emkhakheni wokuvikelwa kwemvelo:Njengezinto eziyinhloko zezihlungi zezinhlayiya zezimoto zikadizili (i-DPF), ingabamba u-99.7% we-PM2.5
- Inguquko Yamandla:Ukusekelwa kwama-electrode kwamaseli kaphethiloli e-oxide aqinile (i-SOFC) kukhulisa ukusebenza kahle kokukhiqizwa kwamandla kufike ku-65%
- Ukwelapha ngezokwelapha:Isakhiwo sembobo yezicafu zamathambo eziphrintiwe nge-3D sikhuthaza ukukhula kwamaseli futhi sifinyeza umjikelezo wokuphulukiswa kwezokwelapha ngo-30%
- Ukukhiqizwa kwe-semiconductor:Isikhathi sokuphila kwama-wafer polishing pads sandiswe kathathu, kanti inqubo ye-TSMC ye-3nm ithengwe ngobuningi.
Isikhathi sokuthunyelwe: Julayi-30-2025