Graphite yokhala ndi zokutira za TaC

I. Kufufuza magawo a njira

1. Dongosolo la TaCl5-C3H6-H2-Ar

2. Kutentha kwa malo osungira:

Malinga ndi njira ya thermodynamic, zimawerengedwa kuti kutentha kukapitirira 1273K, mphamvu ya Gibbs ya reaction imakhala yochepa kwambiri ndipo reaction imakhala yokwanira. KP yokhazikika ya reaction ndi yayikulu kwambiri pa 1273K ndipo imawonjezeka mwachangu ndi kutentha, ndipo kukula kwa kukula kumachepa pang'onopang'ono pa 1773K.

Mphamvu pa mawonekedwe a pamwamba pa chophimbacho: Pamene kutentha sikuli koyenera (kokwera kwambiri kapena kotsika kwambiri), pamwamba pake pamakhala mawonekedwe a kaboni kapena ma pores otayirira.

(1) Pa kutentha kwambiri, liwiro la kayendedwe ka maatomu kapena magulu a reactant ndi lachangu kwambiri, zomwe zimapangitsa kuti kugawika kwa zinthu kusagawike bwino panthawi yosonkhanitsa zinthu, ndipo madera olemera ndi osauka sangasinthe bwino, zomwe zimapangitsa kuti ma pores ayambe.

(2) Pali kusiyana pakati pa kuchuluka kwa ma alkanes omwe amapangidwa ndi pyrolysis ndi kuchuluka kwa tantalum pentachloride komwe kumachepa. Mpweya wa pyrolysis ndi wochuluka ndipo sungaphatikizidwe ndi tantalum pakapita nthawi, zomwe zimapangitsa kuti pamwamba pake pakhale kaboni.

Kutentha kukafika koyenera, pamwamba paChophimba cha TaCndi wandiweyani.

TaCTinthu tating'onoting'ono timasungunuka ndi kusonkhana pamodzi, mawonekedwe a kristalo amakhala athunthu, ndipo malire a tirigu amasinthasintha bwino.

3. Chiŵerengero cha haidrojeni:

Kuphatikiza apo, pali zinthu zambiri zomwe zimakhudza ubwino wa utoto:

-Ubwino wa pamwamba pa nthaka

- Malo osungiramo gasi

- Mlingo wa kufanana kwa kusakaniza kwa mpweya wothira

II. Zolakwika zomwe zimachitika kawirikawirichophimba cha tantalum carbide

1. Kuphimba ming'alu ndi kutsekeka

Kuchuluka kwa kutentha kwa mzere CTE yolunjika:

2. Kusanthula bwino zolakwika:

(1) Chifukwa:

(2) Njira yofotokozera makhalidwe

① Gwiritsani ntchito ukadaulo wa X-ray diffraction kuti muyese mphamvu yotsala.

② Gwiritsani ntchito lamulo la Hu Ke kuti muyerekezere kupsinjika kotsala.

(3) Mafomula ogwirizana

3. Wonjezerani kugwirizana kwa makina pakati pa chophimba ndi substrate

(1) Chophimba cha kukula pamwamba pa malo

Kuyika kwa kutentha ndi ukadaulo wofalitsa TRD

Njira yosungunuka ya mchere

Chepetsani njira yopangira

Chepetsani kutentha kwa reaction

Mtengo wotsika kwambiri

Wosamalira chilengedwe kwambiri

Yoyenera kupanga mafakitale akuluakulu

(2) Chophimba chosinthira cha kompositi

Njira yogwirira ntchito limodzi

Matenda a mtima (CVD)njira

Chophimba cha zigawo zambiri

Kuphatikiza ubwino wa gawo lililonse

Sinthani kapangidwe kake ndi kuchuluka kwake mosavuta

4. Kuyika kwa kutentha ndi ukadaulo wofalitsa TRD

(1) Njira Yochitira Zinthu

Ukadaulo wa TRD umatchedwanso njira yolumikizira, yomwe imagwiritsa ntchito njira ya boric acid-tantalum pentoxide-sodium fluoride-boron oxide-boron carbide kuti ikonzekerechophimba cha tantalum carbide.

① Boric acid wosungunuka umasungunula tantalum pentoxide;

② Tantalum pentoxide imachepetsedwa kukhala maatomu a tantalum ogwira ntchito ndipo imafalikira pamwamba pa graphite;

③ Maatomu a tantalum ogwira ntchito amamatiridwa pamwamba pa graphite ndipo amachitapo kanthu ndi maatomu a kaboni kuti apangechophimba cha tantalum carbide.

(2) Chinsinsi Chothandizira

Mtundu wa chophikira cha carbide uyenera kukwaniritsa zofunikira kuti mphamvu yopanda okosijeni ya chinthu chomwe chimapanga carbide ikhale yokwera kuposa ya boron oxide.

Mphamvu ya Gibbs ya carbide ndi yochepa mokwanira (kupatula apo, boron kapena boride ingapangidwe).

Tantalum pentoxide ndi oxide yopanda mbali. Mu borax yosungunuka kwambiri, imatha kuchitapo kanthu ndi alkaline oxide wamphamvu wa sodium oxide kuti ipange sodium tantalate, potero imachepetsa kutentha koyambirira kwa reaction.