1. Mmepụta nke diamond mkpuchi carbide
Ụkpụrụ nke ịgwakọta ntụ ntụ ígwè na diamond, na-ekpo ọkụ na okpomọkụ na-ekpo ọkụ na mkpuchi maka oge ụfọdụ n'okpuru agụụ. N'ebe okpomọkụ a, ikuku ikuku nke ígwè ahụ zuru ezu maka ikpuchi, ma n'otu oge ahụ, a na-etinye ígwè ahụ n'elu diamond iji mepụta diamond mkpuchi.
2. Nhọrọ nke metal mkpuchi
Iji mee ka mkpuchi diamond guzosie ike ma bụrụ nke a pụrụ ịdabere na ya, na ịghọta nke ọma mmetụta nke ihe mkpuchi mkpuchi na ike mkpuchi, a ghaghị ịhọrọ ígwè mkpuchi. Anyị maara na diamond bụ alloomorphism nke C, na lattice ya bụ tetrahedron mgbe niile, ya mere, ụkpụrụ nke mkpuchi ihe mejupụtara ígwè bụ na ígwè ahụ nwere ezigbo mmekọrịta maka carbon. N'ụzọ dị otú a, n'okpuru ọnọdụ ụfọdụ, mmekọrịta kemịkalụ na-eme na interface, na-eme ka njikọ kemịkal siri ike, na akpụkpọ anụ Me-C na-etolite. Usoro ntinye na nchikota na usoro diamond-metal na-egosi na mmekọrịta kemịkalụ na-eme naanị mgbe adhesion na-arụ ọrụ AW> 0 wee ruo otu uru. The obere oge otu B metal ọcha na oge table, dị ka Cu, Sn, Ag, Zn, Ge, wdg nwere adịghị mma affinity maka C na ala adhesion ọrụ, na agbụ e guzobere bụ molekụla agbụ nke na-adịghị ike na-ekwesịghị họrọ; mgbanwe metals na ogologo oge table, dị ka Ti, V, Cr, Mn, Fe, wdg, nwere nnukwu adhesion ọrụ na usoro nke C. The mmekọrịta ike nke C na mgbanwe metals na-abawanye na ọnụ ọgụgụ nke d oyi akwa electrons, otú Ti na Cr ndị ọzọ dabara adaba maka ikpuchi ọla.
3. Nnwale oriọna
Na okpomọkụ nke 8500C, diamond enweghị ike iru ike efu nke carbon carbon arụnyere n'elu diamond na ntụ ntụ na-emepụta metal carbide, ma ọ dịkarịa ala 9000C iji nweta ume dị mkpa maka nhazi nke carbide metal. Otú ọ dị, ọ bụrụ na okpomọkụ dị oke elu, ọ ga-eme ka ọkụ na-ere ọkụ na diamond. N'ịtụle mmetụta nke njehie nha okpomọkụ na ihe ndị ọzọ, a na-edozi okpomọkụ ule mkpuchi na 9500C. Dị ka enwere ike ịhụ site na mmekọrịta dị n'etiti oge mkpuchi na ọsọ mmeghachi omume (n'okpuru),? Mgbe ị nwetasịrị ike n'efu nke ọgbọ carbide metal, mmeghachi omume na-aga ngwa ngwa, na ọgbọ nke carbide, ọnụego mmeghachi omume ga-eji nwayọọ nwayọọ na-ebelata. Obi abụọ adịghị ya na site na mgbatị nke oge mkpuchi, a ga-eme ka njupụta na ịdị mma nke oyi akwa ahụ dịkwuo mma, ma mgbe minit 60 gasịrị, àgwà nke oyi akwa adịghị emetụta nke ukwuu, n'ihi ya, anyị na-edozi oge mkpuchi dị ka 1 awa; ka oghere ahụ dị elu, ọ ka mma, mana oke na ọnọdụ ule, anyị na-ejikarị 10-3mmHg.
Ụkpụrụ nkwalite ikike ntinye ngwugwu
Nsonaazụ nnwale na-egosi na ahụ nwa ebu n'afọ siri ike karịa diamond mkpuchi mkpuchi karịa diamond enweghị mkpuchi. Ihe kpatara ike nsonye siri ike nke ahụ nwa ebu n'afọ na diamond mkpuchi bụ na, n'onwe ya, enwere ntụpọ elu na micro-cracks n'elu ma ọ bụ n'ime diamond ọ bụla na-enweghị mkpuchi. N'ihi ọnụnọ nke microcracks ndị a, ike nke diamond na-ebelata, n'aka nke ọzọ, ihe C nke diamond anaghị emeghachi omume na akụkụ ahụ nwa ebu n'afọ. Ya mere, taya taya nke diamond na-enweghị mkpuchi bụ naanị ngwugwu extrusion igwe, na ụdị ngwugwu a adịghị ike nke ukwuu. Ozugbo ibu ahụ, microcracks ndị dị n'elu ga-eduga na ntinye uche nke nrụgide, na-ebute mbelata ikike ntinye ngwugwu. Ihe dị iche iche nke diamond na-ebufe ibu dị iche iche, n'ihi ịkwanye ihe nkiri ígwè, ntụpọ diamond lattice na micro cracks na-ejupụta, n'otu aka ahụ, ike nke diamond a na-ekpuchi ya na-abawanye, n'aka nke ọzọ, jupụtara na micro cracks, enwekwaghị ihe mgbagwoju anya nke nrụgide. Nke ka mkpa, ntinye nke metal ejikọtara na taya taya na-agbanwe n'ime carbon na elu diamondThe infiltration nke ogige. Ihe si na ya pụta bụ metal bonding na diamond wetting angle site na ihe karịrị 100 o ruo ihe na-erughị 500, na-eme ka metal ahụ dịkwuo mma maka wetting diamond, mee ka taya ahụ nke mkpuchi diamond setịpụrụ site na ngwugwu mbụ extrusion n'ibu n'ime ngwugwu njikọ, ya bụ diamond mkpuchi na taya ahụ nkekọ, si otú a na-emeziwanye ahụ nwa ebu n'afọ.
Ikike ntinye ngwugwu. N'otu oge ahụ, anyị kwenyere na ihe ndị ọzọ dị ka sintering paramita, nha diamond mkpuchi mkpuchi, ọkwa, nha nwa ebu n'afọ na ihe ndị ọzọ nwere mmetụta ụfọdụ na ike ntinye ngwugwu. Nrụgide sirinji kwesịrị ekwesị nwere ike ịbawanye njupụta na-akụda ma melite ike nke ahụ nwa ebu n'afọ. Kwesịrị ekwesị sintering okpomọkụ na mkpuchi oge nwere ike ịkwalite elu okpomọkụ mmeghachi omume kemịkal nke taya ahụ mejupụtara na mkpuchi metal na diamond, nke mere na nkekọ ngwugwu guzosie ike, na diamond ọkwa dị mma, kristal Ọdịdị yiri nke ahụ, yiri nkebi na-agba ọsọ bụ soluble, na ngwugwu set ka mma.
Ndepụta sitere na Liu Xiaohui
Oge nzipu: Mar-13-2025
