1. kristal Framework na Bonding Ọdịdị nke Ti ₂ AlC
1.1 Machie Ndị otu Ezinụlọ na Usoro Atọmk Piling
(Ti2AlC MAX ntụ ntụ ntụ ntụ)
Ti ₂ AlC bụ nke amachi ezinụlọ, otu klas nke nanolaminated ternary carbides na nitrides nwere usoro izugbe Mₙ₊₁ AXₙ, ebe M bụ metal nnofega n'oge, A bụ ihe otu A, na X bụ carbon ma ọ bụ nitrogen.
Na Ti ₂ AlC, titanium (Nke) na-arụ ọrụ dị ka akụkụ M, aluminom (Al) dị ka akụkụ A, na carbon (C) dị ka akụkụ X, ịzụlite a 211 kpuchie (n=1) ya na akwa Ti ₆ C octahedra na Al atọ ekpokọtara n'akụkụ c-axis na lattice hexagonal..
Ihe owuwu ụlọ a nke nwere ụdị nke na-etinye njikọ njikọ siri ike n'ime Ti– C n'ígwé nwere njikọ ígwè adịghị ike n'etiti ụgbọ elu Ti na Al, na-ebute ngwakọ ngwakọ nke na-egosipụta ma seramiiki na nke ọla.
The inogide Ti– C covalent netwọk na-enye elu rigidity, nkwụsi ike thermal, na iguzogide oxidation, mgbe metal Ti– Al bonding na-enyere aka eletriki conductivity, ndidi ujo thermal, na mmebi nguzogide na-adịghị ahụkebe na seramiki ọkọlọtọ.
Ihe abụọ a na-apụta site na ọdịdị anisotropic nke njikọ kemịkalụ, nke na-enye ohere maka usoro nkwụsị ike dị ka ịmepụta kink-band, delamination, na isi ụgbọ elu na-ekewa n'okpuru nrụgide, kama ịgbaji agbaji agbaji.
1.2 Framework dijitalụ na Njirimara Anisotropic
Nhazi dijitalụ nke Ti abụọ AlC na-egosipụta d-orbitals na-ekpuchi site na titanium na p-orbitals sitere na carbon na aluminom dị arọ., na-eduga na nnukwu ọkpụrụkpụ nke steeti na ogo Fermi na ọkụ eletrik na ọkụ ọkụ n'akụkụ ụgbọ elu ndị bụ isi..
Nke a dara conductivity– pụrụ iche na ngwaahịa seramiiki– na-enye ohere ngwa na elu-okpomọkụ electrodes, ndị na-anakọta dị adị, na nchekwa electromagnetic.
A na-akpọ anisotropy ụlọ: mgbasawanye thermal, modul mgbanwe, na mgbochi eletrik na-adịgasị iche n'ụzọ dị egwu n'etiti a-axis (n'ime ụgbọ elu) na c-axis (pụọ n'ụgbọelu) ntụziaka n'ihi na nkewa bonding.
Dị ka ọmụmaatụ, Uto okpomọkụ n'akụkụ c-axis dị obere karịa n'akụkụ a-axis, na-enye aka n'ịgbalite mgbanaka ọkụ ọkụ.
Ọzọkwa, ihe na-eweta a belatara ike ọgwụgwụ Vickers (~ 4– 6 Nkezi ọkwa ọkwa) dị iche na poselin ọkọlọtọ dị ka alumina ma ọ bụ silicon carbide, ma na-echekwa modul Ntorobịa dị elu (~ 320 GPA), na-egosipụta nchikota ya dị iche iche nke àgwà dị nro na njigide.
Ntụle a na-eme Ti abụọ AlC ntụ ntụ dabara adaba maka seramiki machinable na ihe mejupụtara mmanụ aṅụ.
( Ti2AlC MAX ntụ ntụ ntụ ntụ)
2. Synthesis na Ijikwa Ti Two AlC Powder
2.1 Usoro nrụpụta ntụ ntụ siri ike na steeti dị elu
Ti ₂ AlC ntụ ntụ na-arụ ọrụ nke ọma site na nzaghachi steeti siri ike n'etiti ihe mmalite ma ọ bụ ihe mejupụtara., dị ka titanium, aluminom, na carbon, n'okpuru nsogbu okpomọkụ (1200– 1500 Celsius C )na inert ma ọ bụ agụụ ihie ikuku ikuku.
Mmeghachi omume: 2Nke + Al + C → Ti₂ AlC, a ga-ejikwa nlezianya chịkwaa nke ọma ka ịzenarị nhazi usoro mmecha dịka TiC, Nke atọ Al, ma ọ bụ TiAl, nke na-emebi arụmọrụ bara uru.
Mechanical alloying na-arapara n'ahụ ọgwụgwọ okpomọkụ bụ ihe ọzọ ejirila usoro eme ihe, Ebe a na-egweri ntụ ntụ elemental iji nweta ngwakọta nke ọkwa atomic tupu ekpochapụ ya iji mepụta usoro MAX..
Usoro a na-enye ohere njikwa nha nke ọma na homogeneity, dị mkpa maka ụzọ ngwakọta ọhụrụ.
Usoro ọkaibe ọzọ, dị ka ihe na-akpalite plasma sintering (SPS), kemịkalụ vapor ntinye (CVD), na ngwakọta nnu gbazere, na-enye ụzọ na-adọ-ọcha, nanostructured, ma ọ bụ gbakwasara Ti abụọ ntụ ntụ AlC nwere ụdị ọdịdị ahaziri iche.
Ngụkọta nnu gbazere, karịsịa, na-enye ohere ibelata okpomọkụ mmeghachi omume na mgbasawanye nke ka mma site n'ime ihe dị ka usoro mgbanwe nke na-eme ka kinetics gbasaa..
2.2 Ntụle Morphology, Ịdị ọcha, na ilekọta ihe ndị a ga-atụle
Ụdị ọdịdị nke Ti abụọ AlC ntụ ntụ– sitere na ibe n'ikuku na-enweghị isi ruo na platelet dị ka granules gburugburu– dabere na ụzọ njikọ na omume nhazi nhazi dịka igwe igwe ma ọ bụ otu.
Ụmụ irighiri ihe dị ka Platelet na-egosipụta kristal oyi akwa dị n'ime ma na-aba uru maka ịkwado ihe mejupụtara ma ọ bụ ịmepụta nnukwu ihe ederede..
Ogologo oge ịdị ọcha dị oke mkpa; ọbụlagodi obere TiC ma ọ bụ Al abụọ O isii mmetọ nwere ike ịgbanwe n'ụzọ dị ukwuu, eletriki, na àgwà oxidation.
Ọdịiche X-ray (XRD) na eletrọn microscope (ENWEGHỊ / NWEGHỊ) A na-eji ya eme ihe mgbe niile iji nyochaa nhazi oge na microstructure.
N'ihi na aluminom dị arọ na-emeghachi omume na oxygen, Ti ₂ AlC ntụ ntụ bụ ngwa ngwa na mpaghara oxidation elu, imepụta akwa Al ₂ O abụọ dị gịrịgịrị nke nwere ike ịfefe ngwaahịa ahụ mana ọ nwere ike igbochi njikọ ma ọ bụ njikọta ihu na ngwakọta..
Ya mere, ohere nchekwa n'okpuru inert ambience na nhazi na gburugburu ebe a na-achịkwa dị mkpa iji chekwaa iguzosi ike n'ezi ihe.
3. Omume bara uru na usoro arụmọrụ
3.1 Ịdịgide Mechanical na Mmegide Mmebi
Otu n'ime ihe kachasị ịtụnanya nke Ti ₂ AlC bụ ikike ọ nwere iji gbochie mmebi akụrụngwa na-emebighị nnukwu ọdachi., ụlọ obibi akpọrọ “na-emebi nguzogide” ma ọ bụ “igwe eji eme ihe” na ceramik.
N'okpuru tọn, ihe ahụ dabara na nchegbu site na ngwaọrụ ndị dị ka microcracking, isi ụgbọ elu delamination, na oke ọka na-akpụ akpụ, nke na-ekpochapụ ike ma gbochie mgbaji gbasaa.
Omume a dị nnọọ iche na seramiki ọdịnala, nke na-adaba na mberede mgbe ha ruru oke ngbanwe ha.
Enwere ike iji ngwa ọdịnala rụọ ọrụ nke ₂ AlC na-enweghị tupu ịmalite, ikike a na-adịghị ahụkebe n'etiti ceramik na-ekpo ọkụ, na-ebelata ọnụ ahịa mmepụta na ime ka o kwe omume maka geometry mgbagwoju anya.
Na mgbakwunye, ọ na-egosiputa nkwụsi ike nke okpomọkụ dị mma n'ihi oke okpomọkụ dị ala na nnukwu okpomọkụ, na-eme ka ọ dị mma maka ihe ndị e debere na nhazi ọkwa okpomọkụ ngwa ngwa.
3.2 Nguzogide Oxidation na Nchekwa Okpomọkụ dị elu
Mgbe okpomọkụ dị elu (dị ka 1400 Celsius C na ikuku), Ti ₂ AlC na-emepụta alumina nchebe (Al abụọ O ATO) ọnụ ọgụgụ dị n'elu ya, nke na-arụ ọrụ dị ka ihe mgbochi mgbasa na ịnweta ikuku oxygen, budata slowing ala ọzọ oxidation.
Omume a na-agafe onwe ya yiri nke a na-ahụ na alloys na-emepụta alumina ma dị mkpa maka nchekwa ogologo oge na ikuku ikuku na ngwa ike..
Agbanyeghị, n'elu 1400 Celsius C, Nhazi nke TiO abụọ na-adịghị echebe ya na n'ime oxidation nke aluminom nwere ike ime ka mbibi dị ngwa ngwa, na-amachi ojiji oke okpomọkụ dị elu.
Na mbelata ma ọ bụ enweghị ntọala, Nke abụọ AlC na-edobe nkwụsi ike nhazi ihe dịka 2000 Celsius C, na-egosipụta phenomenal refractory àgwà.
Nguzogide ya na neutron irradiation ma belata ọnụọgụ atomic na-emekwa ka ọ bụrụ ngwaahịa ndoro-ndoro maka ihe ndị na-ahụ maka ngwakọta nuklia..
4. Ngwa na Ngwakọta nka nka n'ọdịnihu
4.1 Akụkụ dị elu na ihe owuwu
A na-eji ntụ ntụ Ti ₂ AlC na-emepụta ceramics ma mechaa maka oke ikuku, nke mejupụtara agụba turbine, ọkụ, na ikpo ọkụ akụkụ ebe oxidation resistance na thermal ujo iguzogide dị oké egwu.
Na-ekpo ọkụ ma ọ bụ kpalie plasma sintered Ti abụọ AlC na-egosiputa ike mgbanwe dị elu na nguzogide nrapu, karịa ọtụtụ ceramik monolithic n'ọnọdụ ndapụta mbugharị thermal cyclic.
Dị ka ihe mkpuchi, ọ na-echekwa ihe ndị dị nchara site na oxidation ma na-eyi na mbara igwe na sistem ike ike.
Igwe eji arụ ọrụ ya na-enyere aka ịrụzi ọrụ yana imecha nkenke, uru dị ukwuu karịa ceramik na-esighi ike nke chọrọ igwe ihe ruby.
4.2 Uru na Multifunctional Product Systems
Agafee ọrụ ụkpụrụ ụlọ, A na-enyocha Ti ₂ AlC n'ime ngwa bara uru na-eme ka arụmọrụ ọkụ eletrik ya na usoro dị larịị.
Ọ na-arụ ọrụ dị ka ihe mmalite maka imepụta MXenes akụkụ abụọ (eg, C ₂ Tₓ atọ) site nghọta etching nke Al oyi akwa, na-enyere ngwa na nchekwa ike, sensọ, na nchekwa electromagnetic nsogbu.
Na ngwaahịa ngwakọta, Ti ₂ AlC ntụ ntụ na-eme ka ịdịte aka na ọkụ ọkụ nke seramiiki matrix composites. (Ndị CMC) na ígwè matrix composites (MMC).
Ya lubricious ọdịdị n'okpuru okpomọkụ– n'ihi mfe isi ụgbọ elu shiee– na-eme ka ọ dị mma maka ịgbanye mmanụ na-agba onwe ya na akụkụ ndị na-ebugharị na usoro ikuku.
Nnyocha na-ebilite na-elekwasị anya na mbipụta 3D nke Ti ₂ AlC dabeere na ink maka mmepụta net nke ihe seramiiki dị mgbagwoju anya., na-akwalite ókè nke mmepụta ihe mgbakwunye na ihe refractory.
Na nchịkọta, Ti ₂ AlC MAX ntụ ntụ na-anọchite anya mgbanwe paradigm na sayensị ngwaahịa seramiiki, na-ejikọta oghere dị n'etiti ígwè na poselin site na nhazi atọm ya gbawara agbawa na njikọ ngwakọ.
Ngwakọta ya dị iche iche nke machinability, thermal nche, oxidation iguzogide, na eletrọnịkị conductivity na-enye ohere ọzọ-emana components maka aerospace, ike, na mmepụta elu.
Ka synthesis na njikwa teknụzụ na-etolite, Nke abụọ AlC ga-arụ ọrụ dị oke mkpa na ngwaahịa injinia emere maka gburugburu oke na ọtụtụ ọrụ.
5. Onye na-enye
RBOSCHCO bụ onye na-ebubata kemịkalụ zuru ụwa ọnụ ntụkwasị obi & emeputa na ihe karịrị 12 ahụmịhe afọ n'inye kemịkalụ dị oke mma na Nanomaterials. Ụlọ ọrụ ahụ na-ebupụ n'ọtụtụ mba, dị ka USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, toro toro, Mexico, Azerbaijan, Belgium, Saịprọs, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Ọstrelia,Germany, France, Ịtali, Portugal wdg. Dịka onye nrụpụta mmepe nanotechnology na-eduga, RBOSCHCO na-achị ahịa. Ndị otu ọrụ ọkachamara anyị na-enye ngwọta zuru oke iji nyere aka melite arụmọrụ nke ụlọ ọrụ dị iche iche, mepụta uru, na mfe ịnagide nsogbu dị iche iche. Ọ bụrụ na ị na-achọ aluminum carbide, biko nweere onwe gị ịkpọtụrụ anyị wee ziga ajụjụ.
Tags: Ti2AlC MAX ntụ ntụ ntụ ntụ, Ti2AlC ntụ ntụ, Titanium aluminom carbide ntụ ntụ
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