Graphite ine TaC coating

I. Process parameter exploration

1. TaCl5-C3H6-H2-Ar system

2. Deposition tembiricha:

Zvinoenderana neiyo thermodynamic formula, inoverengerwa kuti kana tembiricha yakura kupfuura 1273K, iyo Gibbs yemahara simba rekuita yakadzikira uye kuita kwacho kunenge kuzere. Iyo reaction inogara KP yakakura kwazvo pa1273K uye inowedzera nekukurumidza nekushisa, uye mwero wekukura zvishoma nezvishoma unodzikira pa1773K.

Kufurira pamusoro pe morphology yejasi: Kana tembiricha isingakodzeri (yakanyanya kukwirira kana kuderera zvakanyanya), iyo yepamusoro inopa yemahara kabhoni morphology kana yakasununguka pores.

(1) Pakupisa kwakanyanya, kukurumidza kwekufamba kwemaatomu anoshanda anogadzirisa maatomu kana mapoka anokurumidza, izvo zvinozotungamira mukugovewa kusina kuenzana panguva yekuunganidzwa kwezvinhu, uye nzvimbo dzakapfuma uye dzine urombo hazvigone kuchinjika zvakanaka, zvichikonzera pores.

(2) Pane musiyano pakati pepyrolysis reaction rate yealkanes uye kuderedzwa kwekuita mwero wetantalum pentachloride. Iyo pyrolysis kabhoni yakawandisa uye haigone kusanganiswa ne tantalum nekufamba kwenguva, zvichiita kuti kumusoro kuputirwe nekabhoni.

Kana kutonhora kwakakodzera, pamusoro peTaC coatingyakaoma.

TaCzvimedu zvinonyunguduka uye kuungana pamwe chete, iyo fomu yekristaro yakakwana, uye muganho wezviyo unoshanduka zvakanaka.

3. Hydrogen ratio:

Mukuwedzera, pane zvakawanda zvinhu zvinokanganisa kunaka kwekuputira:

-Substrate pamusoro pemhando

-Deposition gasi munda

-Dhigirii yekufanana kweiyo reactant gasi kusanganiswa

II. Typical kukanganisa kwetantalum carbide coating

1. Kupfekedza kuputika uye kusvuura

Linear thermal yekuwedzera coefficient linear CTE:

2. Kuongorora kukanganisa:

(1) Chikonzero:

(2) Maitiro ehunhu

① Shandisa X-ray diffraction tekinoroji kuyera iyo yasara dhizaini.

② Shandisa mutemo waHu Ke kufungidzira kushushikana kwasara.

(3) Zvimiro zvinoenderana

3.Enhance mechanical complibility of the coating and the substrate

(1) Surface in-situ kukura coating

Thermal reaction deposition uye diffusion tekinoroji TRD

Yakanyungudutswa munyu nzira

Rerutsa maitiro ekugadzira

Deredza kupisa kwekuita

Mutengo wakaderera

More zvakatipoteredza

Inokodzera kugadzirwa kwakakura kwemaindasitiri

(2) Composite yekushandura coating

Co-deposition process

CVDprocess

Multi-component coating

Kubatanidza zvakanakira chikamu chimwe nechimwe

Flexibly gadzirisa coating kuumbwa uye chikamu

4. Thermal reaction deposition uye diffusion tekinoroji TRD

(1) Maitiro Okuita

TRD tekinoroji inonziwo embedding process, inoshandisa boric acid-tantalum pentoxide-sodium fluoride-boron oxide-boron carbide system kugadzirira.tantalum carbide coating.

① Boric acid yakanyungudutswa inonyungudutsa tantalum pentoxide;

② Tantalum pentoxide yakaderedzwa kuita maatomu anoshanda etantalum uye inopararira pamusoro pegraphite pamusoro;

③ Active tantalum maatomu anoiswa panzvimbo yegraphite uye anoita nemaatomu ecarbon kuti aumbe.tantalum carbide coating.

(2) Chinokosha Chokuita

Mhando ye carbide coating inofanirwa kugutsa zvinodiwa kuti iyo oxidation inogadzira simba remahara rechinhu chinoumba iyo carbide yakakwirira kupfuura iyo boron oxide.

Iyo Gibbs yemahara simba recarbide yakaderera zvakakwana (zvikasadaro, boron kana boride inogona kuumbwa).

Tantalum pentoxide iine neutral oxide. Mupamusoro-tembiricha yakanyungudutswa borax, inogona kuita neakasimba alkaline oxide sodium oxide kuumba sodium tantalate, nokudaro ichideredza yekutanga kuita tembiricha.