I-micropowder ye-silicon carbide eluhlaza ikwenza kanjani ngcono ukusebenza kwezinto zokumboza?
Amakhulu amamitha ngaphezulu, umoya onamandla wadlula. U-Old Li wabopha intambo yakhe yokuphepha ngobuchwepheshe waqala ukuhlola i-blade enkulu ye-wind turbine phambi kwakhe. Iminwe yakhe elukhuni yalandela amamaki amancane okuguga kodwa acindezelayo emaphethelweni angaphambili e-blade—indawo esengozini kakhulu yokushaywa umoya nesihlabathi. Wabubula ubuso, azi ukuthi maduze i-blade kuzodingeka yehliswe ukuze ilungiswe. Ukwembozwa okukhethekile ebusweni be-blade kuwumugqa wayo wokuqala wokuzivikela ekugugulekeni komoya nesihlabathi. Futhi ngaphakathi kwalokhu kuzivikela kukhona “ithambo eliqinile” elibalulekile—i-micropowder eluhlaza ye-silicon carbide.
“Lesi ‘sihlabathi’ esiluhlaza esicwebezelayo singase sibonakale singabalulekile, kodwa ngaphandle kwaso, uqweqwe lwethu lwe-blade luyoba njengephepha!” U-Old Li wayevame ukusho kochwepheshe abasha. Ezweni elikhulu lezinto zokugqoka, i-green silicon carbide micropowder idlala indima engenakuphindwa. Akuyona nje “ithambo” loqweqwe; futhi iyithuluzi eliguquguqukayo elithuthukisa ukusebenza kwalo okuphelele.
“Amathambo Aqinile” Asekela “Isivikelo Sedayimane”
I-silicon carbide eluhlazaI-micropowder, uma siyibeka kalula, iyi-silicon carbide (SiC) emsulwa kakhulu egayiwe kahle ibe yi-powder enobukhulu be-micron. Isici sayo esiphawulekayo ubulukhuni bayo! Ubulukhuni bayo be-Mohs bufinyelela ku-9.5, budlula idayimane ne-cubic boron nitride kuphela, futhi buqine kakhulu kunensimbi evamile. Ukuyifaka ezimbozweni ezahlukahlukene ezingagugi kufana nokufaka izinhlamvu ezincane ezingenakubalwa zedayimane odakeni oluthambile.
Cabanga ngomphezulu wokubopha oshaywe yisihlabathi esisheshayo, imfucumfucu yensimbi, noma uketshezi oluqothulayo. Ukube umphetho wawuyi-resin noma insimbi ethambile nje, ubuzoguga futhi uguguleke ngemizuzwana embalwa. Kodwa-ke, uma i-micropowder eluhlaza ye-silicon carbide ihlakazeke ngokulinganayo ngaphakathi kwe-matrix yokubopha, lezi zinhlayiya eziqinile zisebenza njengezivikelo ezincane ezingenakubalwa kanye “nezinqaba.” Zimunca futhi zisakaze amandla okushaya, zinciphisa kakhulu ukuguguleka nokulahlekelwa kwezinto zokubopha ngokwazo. I-micropowder eluhlaza ye-silicon carbide, umphetho oqinile, ohlala isikhathi eside, usetshenziswa ezindongeni zangaphakathi zamapayipi okumba, amazinyo ebhakede lomgodi, kanye nezingxenye ezibalulekile zokumba uwoyela. Lobu “bulukhuni” bandisa impilo yenkonzo yokubopha ngokushesha, kunciphisa kakhulu imvamisa kanye nezindleko zokulungisa nokufaka esikhundleni.
“Insimbi Eqinisiwe” Iqinisa Umzimba
I-micropowder ye-silicon carbide eluhlaza yenza okungaphezu nje kokunikeza amandla. Iphinde iqinise ukumbozwa.Izinto zokumboza, ikakhulukazi lezo ezisekelwe ku-polymer njenge-epoxy ne-polyurethane, zivame ukuba namandla alinganiselwe, ukuqina, kanye nokumelana nokushisa. I-micropowder ye-silicon carbide eluhlaza isebenza njenge-mesh yensimbi engezwe kukhonkrithi, ithuthukisa kakhulu izakhiwo zemishini zengubo.
1. Amandla kanye neModulus: Izinhlayiya ze-silicon carbide eziluhlaza okwesibhakabhaka eziqinile zibophana ngokuqinile ne-matrix yokumboza, zidlulisa futhi zichithe imithwalo ngempumelelo. Lapho ukumboza kuthinteka noma kugobeka, lezi zinhlayiya zivimbela imifantu ukuthi isakazeke kalula, zithuthukisa kakhulu amandla okuthinteka kwengubo, amandla okugoba, kanye ne-modulus yokunwebeka (ukuqina). Kufana nokufaka amatshe enhlabathini ethambile—ngokwemvelo kwenza umgwaqo ube namandla futhi umelane kakhulu nengcindezi.
2. Ukuqina Okulinganayo Nokumelana Nokushisa:I-carbonide eluhlaza (i-GSIC)ine-coefficient ephansi yokwanda kokushisa kanye nokuqina okuhle kokushisa (ingamelana namazinga okushisa angaphezu kwama-degree Celsius ayi-1,000 ngaphandle kokubola). Uma ingezwa ekumbozweni, ivimbela ngempumelelo ukuguquguquka, ukuqhekeka, ngisho nokuqhekeka okubangelwa ukwanda okungaguquki kanye nokufinyela ezindaweni ezishisayo nezibandayo ezishintshanayo. Lokhu kubalulekile ekumbozweni okusebenza ngaphansi kokushintshashintsha okukhulu kokushisa noma okudinga ukuphiliswa kokushisa okuphezulu. Iqinisekisa ukuthi ukugqoka kuhlala kuzinzile futhi kumelana nokuguquguquka ngaphansi kokushintshashintsha kokushisa.
Ibhalansi ecashile phakathi "kwesivikelo sokushisa" kanye "nenethiwekhi yokuqhuba ukushisa"
Izakhiwo zokushisa zama-micropowders e-GSIC aluhlaza nazo ziye zahlolwa embonini yokumboza, kanti okubalulekile yizidingo zokusetshenziswa.
Ukufakwa Kokushisa: Cabanga ngodonga lwesithando noma ingxenye yenjini edinga ukumelana namazinga okushisa aphezulu.I-GSICAma-micropowders ahlakazeka ngokulinganayo embozweni wokushisa onezimbobo (njengembozo esekelwe ku-ceramic noma ekhethekile esekelwe ku-resin), kuyilapho ama-powders ngokwawo enikeza ukuhanjiswa okuhle kokushisa, akhulisa futhi ukugoba kwendlela yokugeleza kokushisa ngaphakathi kwembozo. Asebenza futhi ngokubambisana nama-pores ukuze avimbele ukushisa ukuthi kungangeni ngokushesha embozweni. Lokhu kufana nokwakha i-maze yezindonga ezakhiwe ngezitini ezincane ezingenakubalwa zokuvimbela (izinhlayiya ze-silicon carbide eluhlaza) nomoya phakathi kwesithando somlilo nomhlaba wangaphandle, okuthuthukisa kakhulu ukufudumala kwembozo.
Ukushabalalisa Ukushisa Okuthuthukisiwe: Ngokuphambene nalokho, ngezingubo zokufaka i-electronic component noma ezinye izingubo ezisekelwe ensimbi ezingagugi ezidinga ukushabalalisa ukushisa okusheshayo, i-green silicon carbide powder iba “uchwepheshe wokuqhuba ukushisa.” Ukushisa kwayo kuphakeme kakhulu kunokwama-polymer amaningi kanye nezinsimbi zensimbi. Uma yakha inethiwekhi yokushisa esebenza kahle ngaphakathi kwengubo, isebenza “njengemigwaqo emikhulu” eminingi, ihambisa ngokushesha ukushisa kwangaphakathi ebusweni bengubo futhi iyishabalalise, ivimbele ukushisa ngokweqile kanye nokwehluleka kwedivayisi. Kufana nokusebenzisa ungqimba “lwe-thermal paste” olufakwe izinhlayiya eziqhuba ukushisa ezisebenza kahle kakhulu ebusweni be-hot chip.