Xa iisampulu zeiiseramikhi ze-silicon carbide ezineembobozabonwa okokuqala elabhoratri, izakhiwo ezifana nobusi ezivezwe phantsi kwe-electron microscope zazifana ngqo nendlu yeenyosi ekhuliswe izihlandlo eziphindwe kayisigidi. Le nto ikhethekileyo ineembobo ze-15-60% ihamba ngokuzolileyo ukusuka kwiindawo zokutsha zeenjini zeenqwelo-moya iye kubomi bethu bemihla ngemihla.
Kwi-turbine yegesi kwi-1600℃, izinto eziqhelekileyo sele zijike zaba yintsimbi enyibilikisiweyo, kodwa i-silicon carbide eneembobo igcina uzinzo olumangalisayo. Kunyaka ophelileyo, xa wayetyelele iShanghai Institute of Ceramics yeChinese Academy of Sciences, umphandi ubonise uvavanyo olunomdla: ukubeka iphepha le-silicon carbide enezimbobo kwilangatye le-oxygen-acetylene (malunga ne-3000℃), i-thermometer engasemva ibonise ukuba inyuke ngama-72℃ kuphela. Olu xhathiso lobushushu oluvela kwisakhiwo sekristale ye-β-SiC luyenza ibe "sisikrweqe esingabonakaliyo" senkqubo yokukhusela ubushushu yeenqwelo-moya. Okungcono nangakumbi, ezo mbobo zinkulu ze-micron zifana neetshimini ezincinci ezingenakubalwa, zinciphisa ukusebenza kakuhle kokuqhuba ubushushu ngama-40-60% xa kuthelekiswa neeceramics eziqinileyo.
Mhlawumbi kwanezazinzulu zezinto azilindelanga ukuba olu hlobo lwe-ceramic, olwalwenzelwe iimeko ezingaqhelekanga, luza kuphinda luqale ukusebenza kwicandelo lezonyango. Uphando lwezonyango olupapashwe kwiJournal of Biomaterials ngo-2024 lubonisa ukuba ii-scaffolds ze-silicon carbide ezinezakhiwo ezinobukhulu be-gradient pore (5μm phezu komhlaba kunye ne-200μm ezantsi) zinezinga lokuhlanganiswa kwamathambo eliphindwe ka-2.3 kunelo le-titanium alloy implants yendabuko.
Inkqubo yokulungiselela i-silicon carbide enemingxuma ngokwayo ngumlingo wamakhemikhali. Ngokusebenzisa indlela yokwenza i-pore-forming agent (edla ngokuba yi-polymethyl methacrylate microspheres) okanye indlela yokususa i-reaction, iinjineli zezinto zinokulawula ngokuchanekileyo iimpawu zemingxuma njengabaqholi. Okubangel 'umdla kukuba, ilungelo elilodwa lomenzi we-3M Company eMelika libonisa ukuba ukusebenzisa i-diatomite ephinde yasetyenziswa njengetemplate yendalo akunciphisi nje iindleko zemveliso nge-18%, kodwa kukwafumana isakhiwo se-bionic esifana namathambo e-coral ngokungalindelekanga. Le ndlela "yokuguqula inkunkuma ibe yingcebo" ihambelana ngokuchanekileyo nobulumko bamaTao "bokusebenziseka kwezinto ezingenamsebenzi".
Isicelo
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Ixesha leposi: Julayi-30-2025