Setlamo sa mabili a ho sila

Setlamo se bapala karolo ea bohlokoa ho tlamang likaroloana tsa abrasive ka mokhoa o sireletsehileng, ka hona ho netefatsa hore lejoe le silang le na le lisebelisoa tsa bohlokoa tsa mochini tse joalo ka matla, ho tiea, ho hanyetsa le ho hanyetsa mocheso. E boetse e fana ka matla a hlokahalang a ho tšoara ho abrasive nakong ea ho sila. Ho na le mefuta e meraro ea mantlha ea li-bond tsa majoe a sila: tse thehiloeng ka ceramic, tse thehiloeng ka tšepe le tse thehiloeng ho resin. Litlamo tsa Ceramic li tsejoa ka thepa ea tsona e tsitsitseng ea lik'hemik'hale le ho hanyetsa mocheso o ikhethang. Leha ho le joalo, brittleness ea tsona le ho fokola ha mocheso oa mocheso li etsa hore li se ke tsa tšoaneleha bakeng sa maemo a thata a ho sila ha literene, tse akarelletsang lebelo le phahameng, meroalo e boima, mocheso o phahameng, le ho thothomela ho matla. Hajoale, ha ho na liketsahalo tse tlalehiloeng tsa majoe a sila a ceramic a sebelisoang ho sila seporo.

Lisebelisoa tse entsoeng ka tšepe li ka fana ka matla a phahameng, conductivity e phahameng ea mocheso, le ho hanyetsa ho roala ha majoe a ho sila. Jiang et al. ho lokisitsoe majoe a sila a entsoeng ka koporo [1] le a tšepe [2] a kopantsoeng le majoe a silang ka tšepe a sebelisa phofo ea phofo. Liteko tsa ho sila li senoletse hore karo-karolelano ea ho sila ea lejoe le entsoeng ka tšepe e ne e batla e phahame ka makhetlo a 15 ho feta ea lejoe la ho sila le thehiloeng ho resin, e fihlang holimo ho 686. Leha ho le joalo, matla a phahameng a bond ea tšepe a etsa hore ho be thata hore tlamo e apare nakong ea ts'ebetso ea ho sila, ka tsela eo e pepesa mokelikeli le ho fella ka ho fokotsa lejoe le fokolang la ho itšeha. Ho feta moo, kaha likoloi tse silang ha seporo ha li na maemo a ho chorisa lejoe, majoe a silang a thehiloeng ka tšepe ha a na molemo oa tšebetso ea ho sila. Ho feta moo, mocheso oa sintering oa majoe a silang a kopantsoeng le tšepe o phahame, mokhoa ona o rarahane, litšenyehelo tsa tlhahiso li phahame, 'me moruo oa lejoe la ho sila o fokola. Hona joale, ha ho na mehlala ea majoe a sila a kopantsoeng le tšepe a sebelisoang moleng oa ho sila. Nakong e tlang, lipatlisiso li tla shebana le ho leka-lekanya matla le ho itšeha ha majoe a ho sila a thehiloeng ka tšepe, ho fumana thepa e tala ea tlhahiso ea theko e tlaase, le ho ntlafatsa mokhoa oa ho etsa lihlahisoa. Li-binders tsa resin, tse nang le matla a phahameng, ho tiea, le litheko tse tlase tsa thepa e tala, hammoho le mokhoa o bonolo oa ho bopa, li sebelisoa haholo tlhahisong ea li-abrasive. Hajoale, majoe a sila (ho sila ka mafolofolo le ho sila ka lebelo le phahameng) a kentsoeng likoloing tse silang tsa terene bakeng sa litselana tsa seporo ka hare ho naha le machabeng kaofela ke majoe a silang a thehiloeng ho resin [3,4]. Maemo a ho sila a terene a thata, 'me mocheso oa ho sila o phahame sebakeng se omileng sa ho sila. Ka hona, majoe a silang ka kakaretso a sebelisa li-resin tsa phenolic tse hanyetsanang le mocheso o phahameng, ho khomarela hantle, le ho bōptjoa habonolo, hammoho le mefuta e sa tsoa fetoloa e kang epoxy, polyvinyl chloride, polyamide, polyvinyl ether, bismaleimide, le tse ling tse fetotsoeng tsa phenolic resins [5]. Li-resin tsa polyphenol ether le polyimide resin tse nang le mocheso o phahameng oa ho hanyetsa le thepa ea mochine le tsona li sebelisoa hangata [6]. Zhang et al. [4] o ithutile mekhoa ea ho sila ea majoe a mane a sila a phenolic resin mme a fumana hore ho netefatsa matla, ho tiea, le ho hanyetsa mocheso oa resin ka mocheso o phahameng e ne e le lintlha tsa bohlokoa bakeng sa ho lokisoa ha majoe a phahameng a ts'ebetso. Liphetho tsa Zhang et al. [7] e bontšitse hore matla a tlaase (li-binder content) majoe a sila a ne a e-na le ho itšeha hamonate le ho tlosoa ha thepa e kholo empa a ne a tloaetse ho chesa seporo 'me a ne a e-na le khanyetso e fokolang ea ho apara. Ka lehlakoreng le leng, matla a holimo (li-binder content) majoe a sila a ne a bontša ho hanyetsa ho apara hantle le tekanyo e phahameng ea ho sila empa ho ithata ho fokola. Zhang et al. [8] o ile a fana ka maikutlo a hore debonding ea segokanyimmediamentsi sa sebolokigolo/binder e ne e le lebaka le ka sehloohong bakeng sa ho tšolloa pele ho nako ea sootho fused alumina sila lejoe abrasive, e isang ho palo e tlaase sila le karo-karolelano ea ho sila. Liphuputso tsena li bontša hore matla, ho tiea, ho hanyetsa mocheso, le ho koloba ha resin holim'a lisebelisoa tse sa tšoaneng (li-abrasives, li-filler, joalo-joalo) li ama ka ho toba thepa e feletseng ea lejoe le silang. Ka hona, ke bohlokoa bo boholo ba saense ho khetha li-resin tse nang le matla a phahameng, ho thatafala, ho hanyetsa ho bola ha mocheso, le ho koloba ka matla, le ho hlakisa mokhoa oa ho kopanya oa resin / abrasive, resin / filler, le li-interfaces tse ling tse sa tšoaneng ka har'a tsamaiso ea majoe a sila.

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[2]SUN Daming, JIANG Xiaosong, SUN Hongliang, et al. Microstructure le Mechanical Properties ea Fe-ZTA Cermet e Lokisitsoeng ke Vacuum Hot-pressed Sintering[J]. Materials Research Express, 2020, 7(2): 26518.

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[7]ZHANG Wulin, FAN Xiaoqiang, ZHANG Pengfei, et al. Ho Lekola Sephetho sa Matla a ho Sila Lejoe ho Boitšoaro ba ho Sila Seporo[J]. Tribology, 40 (03): 385-394

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