Chitoliro choteteza cha silicon carbide ceramic: "choteteza cholimba" m'malo opangira mafakitale

Muzochitika zambiri zopangira mafakitale, malo ovuta monga kutentha kwambiri, dzimbiri, ndi kukalamba nthawi zambiri amayesa kulimba kwa zida zosiyanasiyana.Machubu oteteza a silicon carbide ceramicMonga chinthu chofunikira chomwe chimateteza mwakachetechete zigawo zazikulu za zida, chikuchita gawo losasinthika m'mafakitale ambiri omwe ali ndi ubwino wake wapadera. Sili ndi kapangidwe kovuta, koma chifukwa cha "kulimba mtima" ngati khalidwe lake lalikulu, lakhala "mtetezi" wodalirika m'malo opangira mafakitale.
Ubwino waukulu wa machubu oteteza a silicon carbide ceramic amachokera ku zinthu zawo zapadera. Choyamba, imakhala ndi kukana kutentha kwambiri ndipo imatha kusunga kukhazikika kwa kapangidwe kake ngakhale m'malo otentha kwambiri kuposa madigiri 1000 Celsius, popanda kusintha kapena kuwonongeka. Izi zimathandiza kuti igwire ntchito yogwira ntchito yotentha kwambiri monga zitsulo ndi uinjiniya wa mankhwala mosavuta, ndikupanga "chotchinga choteteza" chodalirika cha zigawo zazikulu monga masensa ndi zinthu zotenthetsera mkati. Kachiwiri, kukana kwake dzimbiri ndikwabwino kwambiri, ndipo zimakhala zovuta kuti zinthu monga ma acid amphamvu ndi alkali, komanso mpweya woipa wa mafakitale ndi zakumwa ziwononge kwambiri. Mphamvu iyi ya "anti-corrosion" imakulitsa kwambiri moyo wa chubu choteteza ndipo imachepetsa kuchuluka ndi mtengo wokonza zida. Kuphatikiza apo, zinthu za silicon carbide ceramic zokha zimakhala zolimba kwambiri komanso zimateteza bwino kuvala. Muzochitika zomwe kukangana kumachitika nthawi zambiri monga kunyamula zinthu ndi kusakaniza makina, imatha kukana kuvala, kusunga umphumphu wake, ndikupewa kusokoneza njira yopangira chifukwa cha kuvala kwa zigawo.

Ponena za zochitika zomwe zingagwiritsidwe ntchito, mitundu yosiyanasiyana ya machubu oteteza a silicon carbide ceramic ndi yotakata kwambiri. Mumakampani opanga zitsulo, imatha kuteteza masensa otenthetsa kuti ayesere molondola kutentha mu uvuni wotentha kwambiri popanga zitsulo ndi chitsulo; Mu gawo la uinjiniya wa mankhwala, imatha kukana kuwonongeka kwa mayankho a acidic ndi alkaline ndikupereka chitetezo chowunikira zigawo mu zombo zoyatsira ndi mapaipi; Mumakampani opanga magetsi, ingagwiritsidwe ntchito kuteteza zigawo za zida zotentha kwambiri monga ma boiler ndi ma turbine, kuonetsetsa kuti magetsi akupanga mosalekeza komanso mokhazikika; Kuphatikiza apo, kupezeka kwake kumatha kuwonekanso m'malo otentha kwambiri komanso owononga m'mafakitale monga kuteteza chilengedwe, zida zomangira, ndi mphamvu zatsopano. Kaya ndi kutentha kwambiri, dzimbiri la mankhwala, kapena kuwonongeka kwa makina, bola ngati ndi malo ovuta omwe amafunikira chitetezo, machubu oteteza a silicon carbide ceramic amatha kudalira zabwino zawo kuti atsimikizire kuti zida zikugwira ntchito bwino.
Monga gawo lofunika kwambiri loteteza popanga mafakitale, machubu oteteza a silicon carbide ceramic akhala "oteteza olimba" a zida m'malo ovuta chifukwa cha zabwino zake zazikulu monga kukana kutentha kwambiri, kukana dzimbiri, kukana kuvala, komanso kulimba bwino. Zimapereka chitsimikizo cha kupanga kokhazikika m'mafakitale osiyanasiyana chifukwa cha magwiridwe ake osavuta komanso osakongoletsedwa, komanso zimathandiza anthu ambiri kumvetsetsa kufunika kwapadera kwa zipangizo za silicon carbide ceramic. Ndi chitukuko chopitilira cha ukadaulo wamafakitale, njira zogwiritsira ntchito machubu oteteza a silicon carbide ceramic zipitiliza kukula, kuchita gawo lawo "loteteza" m'minda yambiri ndikuyika mphamvu yokhalitsa pakugwira ntchito bwino komanso kotetezeka kwa mafakitale.