Lapho i-silicon carbide crystal ikhula, "imvelo" ye-interface yokukhula phakathi kwesikhungo se-axial ye-crystal kanye nonqenqema ihlukile, ukuze ukucindezeleka kwe-crystal onqenqemeni kukhuphuke, futhi umkhawulo we-crystal kulula ukukhiqiza "ukukhubazeka okuphelele" ngenxa yethonya lendandatho ye-graphite stop "carbon", indlela yokuxazulula inkinga enqenqemeni ye-8 noma ukwandisa indawo ye-technical .
Njengoba amaphutha amakhulu anjengama- “microtubules” kanye “ne-inclusions” kulawulwa kancane kancane imboni, inselele inselele yamakristalu e-silicon carbide ukuze “akhule ngokushesha, made futhi aminyene, futhi akhule”, unqenqema “amaphutha aphelele” agqama ngendlela engavamile, futhi ngokwanda kobubanzi nokuqina kwe-silicon carbide crystals ehlukahlukene, ububanzi buzoba yisikwele. ukujiya.
Ukusetshenziswa kwe-tantalum carbide TaC coating ukuxazulula inkinga enqenqemeni kanye nokwenza ngcono ikhwalithi yokukhula kwekristalu, okungenye yezinkomba zezobuchwepheshe "zokukhula ngokushesha, ukukhula okukhulu nokukhula". Ukuze kuthuthukiswe ukuthuthukiswa kobuchwepheshe bemboni futhi kuxazululwe ukuncika "kokungenisa" kwezinto ezibalulekile, i-Hengpu iphumelele ekuxazululeni ubuchwepheshe be-tantalum carbide coating (CVD) futhi yafinyelela ezingeni eliphakeme lamazwe ngamazwe.
I-Tantalum carbide TaC coating, ngokombono wokuqaphela akunzima, nge-sintering, i-CVD nezinye izindlela kulula ukuyifinyelela. Indlela ye-Sintering, ukusetshenziswa kwe-tantalum carbide powder noma i-precursor, enezela izithako ezisebenzayo (insimbi ngokuvamile) kanye ne-ejenti yokubopha (ngokuvamile i-polymer yeketanga elide), eboshwe ebusweni be-graphite substrate efakwe ekushiseni okuphezulu. Ngendlela ye-CVD, i-TaCl5+H2+CH4 yafakwa endaweni ye-graphite matrix ku-900-1500℃.
Kodwa-ke, imingcele eyisisekelo efana nokuma kwekristalu ye-tantalum carbide deposition, ukujiya kwefilimu efanayo, ukukhululwa kwengcindezi phakathi kokumboza kanye ne-graphite matrix, ukuqhekeka kwendawo, njll., kuyinselele kakhulu. Ikakhulukazi endaweni yokukhula kwe-sic crystal, impilo yesevisi ezinzile iyipharamitha eyinhloko, inzima kakhulu.
Isikhathi sokuthumela: Jul-21-2023