Ngwongwo na-eyi egwu na-akpasu iwe nke MoNbTaVW mkpuchi mkpuchi elu entropy alloy kwadebere. teknụzụ mkpuchi laser A mụrụ ya n'okpuru ibu dị iche iche (10 N, 20 N, 30 N), amplitudes dị iche iche na-ewe iwe (50 μm, 150 μm, 250 μm), na oge okirikiri dị iche iche (5 000, 10 000, 15 000). Nsonaazụ na-egosi na a kwadebere MoNbTaVW refractory high entropy alloy mkpuchi bụ nke Fe7Ta3 ụdị HCP siri ike ngwọta usoro, FCC siri ike ngwọta na-adọ na (Fe, Ni) matrix na-adọ, nke FCC na-eme ihe na-adịghị gbazee elu entropy alloy ntụ ntụ. Dị ka nyocha nke nnwale nke orthogonal si kwuo, njupụta nke ike na-eme ka ọ na-enwe mmetụta dị ukwuu na ụda uwe ahụ, ibu na-eme ka ọ na-eme ka ọ bụrụ nke abụọ na-enwe mmetụta nke abụọ na ụda iyi ahụ, na nọmba fretting wear cycle na-enwe mmetụta kacha nta na ụda olu. N'ime ha, mkpuchi mkpuchi nke MonbTaVW refractory high entropy alloy mkpuchi rute uru kachasị n'okpuru ọnọdụ iyi egwu nke ugboro 15,000, 20 N, na 250 μm; The fretting wear load na-enwe mmetụta kasị ukwuu na ọnụ ọgụgụ esemokwu, fretting wear amplitude nwere mmetụta nke abụọ kasị ukwuu na ọnụ ọgụgụ esemokwu, na nọmba fretting wear cycle nwere mmetụta kacha nta na ọnụọgụ esemokwu. N'ime ha, ọnụọgụ esemokwu nke mkpuchi mkpuchi mkpuchi mkpuchi mkpuchi nke MonbTaVW na-erute uru kachasị n'okpuru ọnọdụ iyi egwu nke ugboro 10,000, 30 N na 150 μm. Usoro iyi egwu nke MonbTaVW refractory high entropy alloy mkpuchi bụ tumadi oxidative wear na nrapado yie, na-eyi irighiri ihe na-emepụta site na iyi bụ tumadi Ta na W oxides.

Dị ka ihe ọhụrụ na-ewu ewu, elu entropy alloy nwere nnukwu ike ike, ike oxidation nguzogide, pụtara ìhè n'ibu Njirimara, magburu onwe eyi na-eguzogide na corrosion iguzogide n'ihi ya pụrụ iche imewe echiche, elu entropy, lattice distortion, nwayọọ mgbasa na mmanya mmetụta. Refractory elu entropy alloy bụ ụdị ọhụrụ nke multi-isi alloy mepụtara na ndabere nke elu entropy alloy, tumadi esịnede refractory metal ọcha (ebe agbaze elu karịa 1650 ℃, dị ka Nb, Ta, Mo, W, V na ndị ọzọ ọcha). ). Refractory elu entropy alloy nwere ike magburu onwe ya, ike a kapịrị ọnụ, arụ ọrụ okpomọkụ dị elu na ihe eji arụ ọrụ, ma nwee atụmanya ngwa ngwa. Ntụgharị elu entropy alloy na-anọchi anya quinary WTaNbMo na quinary MoNbTaVW bụ ebe na-ekpo ọkụ na mpaghara nyocha nke ihe mkpuchi entropy alloy dị elu.

N'ihi isi ike ya dị elu, ike dị elu, ezigbo nkwụsị nke esemokwu na nguzogide corrosion, mkpuchi mkpuchi mkpuchi entropy dị elu n'oge na-adịghị anya ghọrọ ihe nyocha nke mkpuchi. A na-akwadokarị mkpuchi mkpuchi entropy alloy dị elu site na ịgbasa plasma, sputtering magnetron, ntinye electrochemical, mkpuchi laser na ụzọ ndị ọzọ. N'iji ya tụnyere teknụzụ nkwadebe mkpuchi ndị ọzọ, teknụzụ mkpuchi laser nwere ike gbazee ọtụtụ ihe ndị dị na ígwè, na n'ihi ngwa ngwa jụrụ oyi, mkpuchi nke a kwadebere ya nwere usoro dị mma, nnukwu ihe owuwu na ọnụego dilution dị ala, na mkpụrụ ahụ na-emetụta ntakịrị, nke nwere ike hụ na arụmọrụ dị mma nke ihe mkpuchi; n'otu oge ahụ, mkpuchi na ihe nkedo na-ejikọta metallurgical, nke nwere ike dị elu, ọ dịghịkwa mfe ịdaba n'okpuru ọnọdụ ọrụ mgbagwoju anya. Ya mere, teknụzụ mkpuchi laser ejirila nwayọọ nwayọọ ghọọ nhọrọ mbụ maka nkwadebe nke mkpuchi mkpuchi mkpuchi mkpuchi dị elu, karịsịa mkpuchi mkpuchi mkpuchi mkpuchi mkpuchi.

Ka ọ dị ugbu a, nyocha nke laser cladding refractory high entropy alloy coatings na-elekwasị anya na nguzogide corrosion, isi ike, iyi nguzogide, microstructure na akụkụ ndị ọzọ. Zhao et al. kwadebere WT a N b Mo refractory high entropy alloy site laser cladding, ma kwenye na elu entropy alloy nke a kwadebere site na enyemaka magnetik ka ukwuu. Guan et al. kwadebere NbTiZr na NbTaTiZr refractory high entropy alloy coatings site na laser cladding, ma gosi na ike nke mkpuchi abụọ ahụ dị elu karịa nke mkpụrụ. Lou et al. kwadebere Al0.2CrNbTiV refractory elu entropy alloy mkpuchi site na elu-ọsọ laser cladding. Ọmụmụ ihe ahụ gosipụtara na ike siri ike na oke oke ọka nke ihe mkpuchi nke mkpuchi ahụ dị elu karịa nke mkpụrụ osisi, na ike iguzogide nrụrụ plastik ka mmakwa. Huang et al. kwadebere TiNbZrMo refractory high entropy alloy coatings site na laser cladding, ma mụọ ike ya, na-eyi nguzogide na nguzogide corrosion. Nsonaazụ gosiri na ihe dị iche iche nke mkpuchi ahụ dị mma karịa nke 316L substrate. Agbanyeghị, dabere na nyocha akwụkwọ, enwere ike ịchọpụta na enwere ọmụmụ ole na ole gbasara fretting wear tribological properties nke akwa mkpuchi alloy entropy dị elu kwadebere site na mkpuchi laser. Nji na-eyi akwa bụ ihe pụrụ iche iyi. Mgbe mmegharị nke ihe abụọ na-akpọtụrụ ihe na-emepụta mmebi iyi na ọkwa micron, ọdịda nke akụkụ nke ụdị uwe a kpatara na-esikarị ike ịchọpụta na nyochaa, na mmerụ ahụ kpatara dị oke egwu. Ihe ndị na-emetụta oke iwe na-emetụtakarị na arụmọrụ nke ihe, microstructure na ibu etinyere. Refractory elu entropy alloy mkpuchi nwere ọmarịcha arụmọrụ. Ịmụ uwe na-akpasu iwe nke mkpuchi mkpuchi entropy alloy dị elu nwere ihe dị ukwuu maka ibelata mmerụ ahụ nke iyi egwu na-akpata. Dabere na nhazi nnwale nke orthogonal, ọrụ a na-eduzi nnwale na-akpasu iwe na mkpuchi MoNbTaVW refractory high entropy alloy mkpuchi nke ejiri ihe atọ mee ihe (na-ebu ibu na-eyi egwu, nọmba iyi egwu na-agbagharị agbagharị, fretting wear amplitude) na ọkwa atọ (ibu bụ 10 N, 20 N, 30 N; ọnụ ọgụgụ nke cycles bụ 5 000, 10 000, 15 000; fretting wear amplitude bụ 50 μm, 150 μm, 250 μm) iji na-amụ ya fretting eyi arụmọrụ na fretting yi usoro n'okpuru dị iche iche ibu. na amplitudes dị iche iche.

1 Nnwale

1.1 Nkwadebe nke refractory elu entropy alloy mkpuchi
The mkpụrụ ihe bụ 316L igwe anaghị agba nchara, na mkpụrụ size bụ 15 mm × 15 mm × 10 mm. Tupu mkpuchi laser, a na-ewepụ ọnụ ọgụgụ oxide dị n'elu nke mkpụrụ ahụ site na ichikota ntuziaka, wee tinye ya na ethanol anhydrous ma ọ bụ acetone ngwọta maka ultrasonic ihicha iji wepụ unyi n'elu tupu eji. Ihe mkpuchi mkpuchi mkpuchi nke MonbTaVW dị elu bụ nke TruDisk6006 kwadoro laser cladding. The laser cladding ntụ ntụ bụ spherical MonbTaVW refractory high entropy alloy ntụ ntụ nke Institute of New Materials of Guangdong Academy of Sciences mepụtara. The dayameta ntụ ntụ bụ 50-100 μm (dị ka e gosiri na Figure 1), na atomiki ntakiri nke ọ bụla mmewere ka egosiri na Isiokwu 1. The laser cladding parameters bụ laser ike 3200 W, laser cladding ọsọ 10 mm / s, laser ntụpọ dayameta. 4 mm, defocus 17 mm, ndakọrịta 50%, yana ego nri ntụ ntụ 15.9 g/min. N'oge usoro mkpuchi, a na-eji helium mee ihe dị ka nri ntụ ntụ na-echebe isi iyi gas, a na-echekwa ọnụego gas na 2. 5 L / min.

1. 2 Njirimara nke microstructure nke refractory elu entropy alloy mkpuchi
Ihe mejupụtara usoro nke MonbTaVW elu entropy alloy mkpuchi bụ nke Rigaku Smartlab SE X-ray diffractometer (ihe mgbaru ọsọ Kα bụ ebumnuche Cu), yana akụkụ nyocha nke 20-90º yana ọsọ nyocha nke 5 (°)/ min. Ihe micromorphology na elemental mejupụtara elu mkpuchi mkpuchi mkpuchi entropy alloy dị elu yana elu na-eyi egwu bụ nke Apreo S Hivac na-enyocha ihe igwe eletrọn na-enyocha ihe.

1. 3 Fretting eyi nnwale nke refractory elu entropy alloy mkpuchi
Emere nnwale ahụ na-ewe iwe site n'iji igwe nnwale fretting wear arụrụ n'ụlọ, wee họrọ bọọlụ seramiiki Si3N4 nwere dayameta nke 6 mm ka ọ bụrụ bọọlụ egweri. The fretting wear parameters ka edobere dị ka fretting wear okirikiri nọmba 5000, 10000, 15000, fretting wear load 10N, 20N, 30N, fretting wear amplitude 50μm, 150μm, 250μm. Mgbe nnwale ahụ na-akpasu iwe, enwetara ọdịdị ọdịdị nke ihe mkpuchi ahụ site na iji interferometer ọcha Bruker Control GT-K, wee gbakọọ olu uwe ahụ site na mpaghara profaịlụ akụkụ akụkụ abụọ na ogologo ọnya ahụ.

Iji mụọ nsonaazụ nke ọnụọgụ okirikiri dị iche iche na-eyi egwu (factor A), ibu dị iche iche na-akpasu iwe (ihe B) na ụdị fretting wear amplitudes dị iche iche (ihe C) na arụrụ ọrụ ike nke mkpuchi mkpuchi entropy alloy dị elu, ihe atọ. E mepụtara nnwale orthogonal ọkwa atọ, ma gosipụta ihe nnwale na ọkwa dị na Tebụl 2. Dị ka nnwale orthogonal na-agba agba, e mere tebụl orthogonal iji belata ọnụọgụ nnwale site na 27 ruo 9, dị ka egosiri na tebụl 3.

2 Nsonaazụ na mkparịta ụka

2.1 Usoro nhazi nke usoro nke MonbTaVW refractory high entropy alloy mkpuchi
Ọgụgụ 2 na-egosi eserese XRD nke MonbTaVW refractory high entropy alloy mkpuchi na ntụ ntụ. Site na eserese XRD nke elu entropy alloy powder, enwere ike ịhụ na ọ bụ otu akụkụ nke usoro cubic crystal na-eche ihu (FCC); ihe mkpuchi mkpuchi elu entropy alloy refractory bụ nke HCP siri ike ngwọta (ụkpụrụ ntụaka XRD PDF 12-0604 nke Fe7Ta3), FCC siri ike ngwọta usoro (ụkpụrụ ntụaka XRD kaadị PDF 39-1178 nke TaV2) na (Fe, Ni) matriks frasi . Ọgụgụ 3 na-egosi eserese SEM na EDS nke mkpuchi mkpuchi mkpuchi entropy alloy dị elu nke MonbTaVW kwadebere site na mkpuchi laser. Site na ihe oyiyi SEM nke morphology elu, enwere ike ịhụ na mkpuchi ahụ bụ ihe na-acha ọcha gburugburu na-egbuke egbuke, ụdị dendrites siri ike na matrix isi awọ, na-egosi usoro ngwọta siri ike nke laser cladding elu entropy alloy mkpuchi. Ụmụ irighiri ihe na-acha ọcha na-egbuke egbuke na-egosi na ihe mejupụtara ha bụ W, Ta, Mo, Nb, na V na foto EDS. Site n'iji ihe oyiyi XRD atụnyere, enwere ike ikpebi na ebe a na-acha ọcha na-egbuke egbuke bụ nnukwu entropy alloy powder nke na-adịghị agbaze kpamkpam n'oge usoro mkpuchi laser. N'otu oge ahụ, dị ka ihe oyiyi EDS si dị, enwere ike ịhụ na a na-ekesa nnukwu ihe nke Fe n'ime mkpuchi. Nke a bụ n'ihi na njupụta ike laser dị oke elu n'oge usoro mkpuchi laser iji kwadebe mkpuchi mkpuchi entropy alloy dị elu, na-eme ka nnukwu ihe dị iche iche Fe na matrix na-abanye na mkpuchi ahụ, na-eme ka ọkpụkpụ isi awọ na-eme ka Fe-ọgaranya matrix n'ime mkpuchi. ya bụ, usoro (Fe, Ni) na eserese 2); ihe Fe element na-ejikọta ya na ihe W, Ta, Mo, Nb, na V na elu entropy alloy iji mepụta usoro kristal nke HCP na Fe7Ta3 dị ka isi. Usoro ngwọta siri ike nke HCP, usoro ngwọta siri ike FCC na (Fe, Ni) matrix na-egosi site na akụ ndị dị na Figure 3, n'otu n'otu.

2.2 ọnụ ọgụgụ esemokwu na iyi olu nke MonbTaVW refractory high entropy alloy mkpuchi
Igwe njupụta-tangential ike (FD) bụ akụkụ dị mkpa iji mara oke iwe, nke nwere ike gosipụta nke ọma ụdị uwe mkpuchi mkpuchi entropy alloy dị elu n'oge eyi. Dị ka e gosiri na Figure 4, n'okpuru dị iche iche fretting na-eyi ibu, dị iche iche fretting yi amplitudes, na dị iche iche fretting wear oge okirikiri, udi nke njupụta-tangential ike curve bụ ihe yiri ya, nke na-egosi na n'okpuru dị iche iche nnwale ọnọdụ, fretting na-eyi na. elu nke refractory elu entropy alloy mkpuchi zuru ezu slip (Gross slip).

Esemokwu ọnụọgụ ọnụọgụgụ curve nke fretting wear nke MonbTaVW refractory high entropy alloy mkpuchi na-egosi na Figure 5. Dị ka a pụrụ ịhụ site Figure 5, n'okpuru dị iche iche fretting yi ọnọdụ, tupu 1000 ka 1500 fretting wear cycles, ọ bụ esemokwu na-agba ọsọ-na oge. , na ọnụ ọgụgụ esemokwu adịghị eguzosi ike ma na-egosi usoro elu. Mgbe oge na-agba ọsọ, mgbe ibu bụ 10 N, ọnụ ọgụgụ esemokwu nke elu entropy alloy mkpuchi na dị iche iche fretting wear cycles na dị iche iche fretting wear amplitudes bụ 0.21 ± 0.03; mgbe ibu bụ 20 N, esemokwu esemokwu nke elu entropy alloy mkpuchi na dị iche iche fretting wear cycles na dị iche iche fretting wear amplitudes bụ 0.45 ± 0.03; mgbe ibu bụ 30 N, esemokwu esemokwu nke elu entropy alloy mkpuchi na dị iche iche fretting wear cycles na dị iche iche fretting wear amplitudes bụ 0.63 ± 0.02. A na-ahọrọ ọnụọgụ esemokwu mgbe emechara nkwụsi ike, a na-eme nyocha nke dị iche iche site na iji nyocha orthogonal, dị ka e gosiri na Tebụl 4. N'ime ha, T bụ nchikota nke ihe nyocha nke ihe ndị ahụ, t bụ nchikota nke nchikota nke ihe nyocha. nke ihe ndị ahụ, na oke R bụ ọnụ ahịa mbelata nke nnukwu uru na uru t. Ka R na-ebuwanye ibu, ka mmetụta nke ihe na-akpata na nsonaazụ nnwale ahụ ka ukwuu. Dị ka a pụrụ ịhụ na Isiokwu 4, mmetụta nke fretting eyi ibu na esemokwu ọnụọgụ nke elu entropy alloy mkpuchi bụ kasị ukwuu, mmetụta nke fretting wear okirikiri amplitude na esemokwu ọnụọgụ nke elu entropy alloy mkpuchi bụ nke abụọ, na mmetụta nke fretting wear amplitude na esemokwu esemokwu nke mkpuchi bụ nke kacha nta, nke kwekọrọ na nsonaazụ enwetara site na ọnụọgụ ọnụọgụ esemokwu.

Ọgụgụ 6 bụ akụkụ atọ dị n'akụkụ akụkụ nke uwe elu nke MonbTaVW refractory high entropy alloy mkpuchi. Dị ka a na-ahụ site na foto 6, mgbe fretting wear amplitude bụ 50 μm, ogo eyi nke mkpuchi mkpuchi atọ dị ntakịrị; mgbe fretting wear amplitude bụ 250 μm, wear ogo nke atọ mkpuchi elu bụ nnukwu. Tebụl 5 bụ ụda uwe nke mkpuchi fretting yi na-agbakọ dabere na morphology akụkụ atọ nke eyi elu. A na-edobe ụda olu nke elu mkpuchi mkpuchi mkpuchi entropy alloy dị elu nke e nwetara site na nyocha nyocha nke orthogonal, na-egosikwa nsonaazụ ya na Tebụl 6. N'ime ha, T bụ nchikota nke ihe nyocha nke ihe ndị ahụ, t bụ ihe pụtara nchikota. nke nsonaazụ nnwale nke ihe ndị ahụ, na oke R bụ ọnụ ahịa mbelata nke nnukwu uru na uru t. Ka R na-ebuwanye ibu, ka mmetụta nke ihe na-akpata na nsonaazụ nnwale ahụ ka ukwuu. Site na nsonaazụ nyocha nke nso, enwere ike ịhụ na njupụta na-eyi egwu na-enwe mmetụta kacha nta na oke iwe nke mkpuchi mkpuchi entropy alloy refractory dị elu, ihe na-eme ka ọ na-eyi akwa nwere mmetụta nke abụọ kachasị ukwuu na oke iwe nke fretting. refractory elu entropy alloy mkpuchi, na fretting wear okirikiri nọmba nwere mmetụta kasị ukwuu na fretting wear olu nke mkpuchi.

2.3 Fretting wear usoro nke MonbTaVW refractory elu entropy alloy mkpuchi
Onyonyo 7 bụ ihe onyonyo SEM nke fretting wear morphology nke MonbTaVW refractory high entropy alloy mkpuchi. Dị ka a na-ahụ site na foto 7, a na-ekewa ihe mkpuchi na-egbuke egbuke na mpaghara atọ, ya bụ mpaghara okirikiri ọcha, ebe isi awọ gbara ọchịchịrị na akara ejiji, na ebe isi awọ. A na-ekesa mpaghara isi awọ gbara ọchịchịrị na mpaghara esemokwu n'ụdị flake. E jiri ya tụnyere eserese 6, enwere ike ịhụ na mpaghara isi awọ gbara ọchịchịrị na-apụta dị ka akwụkwọ ndụ akwụkwọ ndụ na-acha ọkụ ọkụ n'ime akụkụ atọ dị n'akụkụ elu nke eyi. Site na nyocha nke EDS na eserese 8, enwere ike ịhụ na mpaghara a bụ oxide metal nke a na-emepụta site na nchikota W, Ta element na O na mkpuchi. Ijikọta EDS, SEM na akụkụ atọ nke morphology nke mkpuchi ahụ, enwere ike ikwenye na mpaghara isi awọ gbara ọchịchịrị bụ irighiri ihe eji eme ihe n'elu mkpuchi mkpuchi alloy dị elu nke entropy n'oge iwe iwe. A naghị ewepụ irighiri ihe ndị a n'oge n'oge usoro eyi na-ewe iwe ma na-ejikọta ya n'elu ka ọ bụrụ oyi akwa esemokwu. N'oge a na-eyi uwe, a ga-ebu ụzọ ebibi ihe ndị a na-eme ka esemokwu ahụ, ya mere, oyi akwa nwere ike ichebe mkpuchi ahụ site n'ichekwa uwe ọzọ, nke a na-egosi dị ka obere uwe na-eyi na foto 6. Site n'ilebawanye anya nke Figure 7, a pụrụ ịhụ ya. A na-ekesa mgbawa na oyi akwa esemokwu (dị ka e gosiri na akụ ndị dị na Figure 7), nke na-egosi na a na-ebibi ihe mkpuchi ahụ na-aga n'ihu n'oge usoro ejiji, na-echebe mkpuchi ahụ.

Dị ka eserese EDS nke mpaghara isi awọ (lee foto 8), ewezuga O element, a na-ekesa ihe ndị ọzọ n'otu n'otu na mpaghara isi awọ, nke na-egosi na ebe isi awọ bụ ihe mkpuchi. Na eserese SEM (lee eserese 7), enwere mgbape n'akụkụ ntụzịaka esemokwu na mpaghara isi awọ n'ime akara iyi, ebe a na-ekesa ebe isi awọ gbara ọchịchịrị n'akụkụ ụzọ esemokwu. Nke a bụ n'ihi na oyi akwa esemokwu kpụrụ site na irighiri ihe eji eme ihe na-ekpughe ihe mkpuchi dị n'okpuru. Mpaghara okirikiri na-acha ọcha na-egbuke egbuke bụ ihe na-adịghị agbaze elu entropy alloy ntụ ntụ mgbe a na-akwado mkpuchi mkpuchi mkpuchi elu nke entropy alloy site na laser cladding, nke nwere ike kwubie site na eserese 3. Ebe okirikiri na-acha ọcha na-egbuke egbuke na ebe isi awọ adịghị ejikọta ya na O element. na-egosi na MonbTaVW refractory high entropy alloy powder na elu entropy alloy mkpuchi nwere ezigbo nguzogide oxidation. The Fe element adịghị ejikọta na ìhè isi awọ na mpaghara isi awọ gbara ọchịchịrị, na-egosi na ihe mkpofu na-eyi enweghị ihe Fe, na Fe element na mkpuchi mkpuchi adịghị emeghachi omume na O element, nke pụtara na HCP. na-adọ kpụrụ site dilution nke Fe element n'oge laser cladding usoro nwere mma eyi iguzogide.

Dabere na nsonaazụ nnwale ndị a dị n'elu, enwere ike ịtụle na: n'oge mmalite nke iyi, elu nke mkpuchi mkpuchi mkpuchi mkpuchi mkpuchi nke MonbTaVW na-aga n'ihu na-emepụta iberibe ihe ndị mejupụtara metal oxides, na iberibe akwa ga-ahapụ n'akụkụ ụzọ nke eyi na-ewe iwe, ma a naghị ewepụta iberibe ihe ụfọdụ na-eyi n'oge ma na-ejikọta ya na-aga n'ihu na-emepụta oyi akwa esemokwu n'elu mkpuchi ahụ. N'oge a, elu mkpuchi na-egosi nrapado uwe. Otú ọ dị, ọkpụrụkpụ nke oyi akwa esemokwu etolite na mmalite ezughị. Ka esemokwu ahụ na-aga n'ihu, oyi akwa esemokwu na-aga n'ihu na-agbaji, nke a na-anọchi anya ya dị ka oge mbụ na-agba ọsọ na ọnụọgụ ọnụọgụ esemokwu. Ka uwe ahụ na-aga n'ihu, oyi akwa esemokwu na-etolite ma na-agbaji, ma a ga-anọgide na-emepụta iberi ndị na-eyi, oyi akwa mgbagwoju anya na-esiwanye ike ma na-eto eto, anaghịzi agbaji, ọnụọgụ esemokwu na-eji nwayọọ nwayọọ na-abịakwute nkwụsi ike. Ya mere, usoro iyi egwu nke MonbTaVW refractory high entropy alloy mkpuchi n'okpuru dị iche iche fretting wear ibu, dị iche iche fretting wear cycles dị iche iche fretting wear amplitudes bụ oxidation eyi na nrapado yie.

Mkpebi 3

(1) MonNbTaVW refractory high entropy alloy mkpuchi bụ nke HCP siri ike na-edozi usoro, FCC siri ike ngwọta na (Fe, Ni) usoro matrix. N'ime ha, usoro ihe ngwọta siri ike nke FCC bụ MonNbTaVW refractory high entropy alloy powder, na HCP siri ike ngwọta bụ usoro HCP na Fe7Ta3 dị ka isi nke Fe element kpụrụ na matriks na-abanye na mkpuchi n'ọtụtụ buru ibu n'oge. Usoro mkpuchi laser na ijikọta ya na ihe W, Ta, Mo, Nb, na V na nnukwu entropy alloy.

(2) Dị ka orthogonal nnwale nso analysis, na fretting wear ibu nwere kasị ukwuu mmetụta na esemokwu ọnụọgụ nke MonbTaVW refractory elu entropy alloy mkpuchi, sochiri fretting wear amplitude, na ọnụ ọgụgụ nke fretting wear cycles bụ nke kacha nta; na fretting wear amplitude nwere kasị ukwuu mmetụta na esemokwu olu nke MonbTaVW refractory elu entropy alloy mkpuchi, sochiri fretting wear ibu, na ọnụ ọgụgụ nke fretting wear cycles bụ nke kacha nta.

(3) The isi iyi ụdị nke fretting eyi nke MonbTaVW refractory elu entropy alloy mkpuchi bụ oxidation eyi na nrapado yie. Iri ihe eji eyi akwa eme n'oge iwe iwe bụ ihe mejupụtara oxides nke ihe Ta na W. Njikọ nke ihe ndị ọzọ nke nnukwu entropy alloy na oxygen adịghị elu, na-egosi na mkpuchi mkpuchi mkpuchi dị elu nwere ezigbo nkwụsị oxidation.