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Idayimani yokwenziwa

Igrit yedayimani iqhele ukusetyenziselwa ukuchaza iinkozo ezincinci (≈0.00004 in.) zedayimani yokwenziwa esetyenziswa njengesixhobo esiphambili ekrwada kubasiki bePDC.Ngokwemichiza kunye neempawu, idayimani eyenziwe ngumntu iyafana nedayimane yendalo.Ukwenza igrit yedayimane kubandakanya inkqubo elula yekhemikhali: ikhabhoni eqhelekileyo ifudunyezwa phantsi koxinzelelo oluphezulu kakhulu kunye nobushushu.Enyanisweni, ukwenza idayimani akulula.

Iikristale zedayimani zomntu ngamnye eziqulethwe kwigrit yedayimani zijongwe ngeendlela ezahlukeneyo.Oku kwenza izinto zomelele, zibukhali, kwaye, ngenxa yokuqina kwedayimani equlethweyo, iyakwazi ukumelana nokunxiba.Ngapha koko, ulwakhiwo olungacwangciswanga olufunyenwe kwidayimane edityanisiweyo yokwenziwa lusebenza ngcono ekuchebeni kunedayimani zendalo, kuba idayimani zendalo ziikhyubhiki zeekristale eziqhekeka ngokulula ecaleni kocwangco, imida yekristale.

I-Diamond grit ayizinzanga kakhulu kumaqondo obushushu aphezulu kunedayimane yendalo, nangona kunjalo.Ngenxa yokuba i-metallic catalyst ebanjelwe kulwakhiwo lwegrit inezinga eliphezulu lokwandiswa kwe-thermal kunedayimani, ukwandiswa kokwahluka kubeka iibhondi zedayimane ukuya kwidayimane phantsi kwe-chear kwaye, ukuba imithwalo iphezulu ngokwaneleyo, ibangela ukusilela.Ukuba iibhondi ziyasilela, iidayimani zikhawuleza zilahleke, ngoko ke iPDC ilahlekelwa bubulukhuni nobubukhali bayo kwaye ingasebenzi.Ukuthintela ukusilela okunjalo, abasiki bePDC kufuneka bapholiswe ngokwaneleyo ngexesha lokomba.

Iitafile zedayimani

Ukwenza itafile yedayimani, igrit yedayimane igalelwa ngetungsten carbide kunye nentsimbi yesibophelelo ukwenza umaleko otyebileyo wedayimani.Zinobume obufana ne-wafer, kwaye kufuneka zenziwe zibe ngqindilili kangangoko kunokwenzeka, kuba umthamo wedayimani wonyusa ubomi bokunxiba.Iitafile zedayimani ezikumgangatho ophezulu ≈2 ukuya kwi-4 mm, kwaye inkqubela phambili yobuchwepheshe iya kwandisa ubukhulu betafile yedayimani.I-Tungsten carbide substrates ziqhelekile ≈0.5 in. ukuphakama kwaye zinemilo enqamlezileyo efanayo kunye nemilinganiselo njengetafile yedayimane.Amacandelo amabini, itafile yedayimane kunye ne-substrate, yenza umsiki (umzobo 4).

Ukwenza i-PDC ibe yimilo eluncedo kubasiki kubandakanya ukubeka igrit yedayimane, kunye ne-substrate yayo, kwinqanawa yoxinzelelo kwaye emva koko i-sintering kubushushu obuphezulu kunye noxinzelelo.

Abasiki bePDC abanakuvunyelwa ukuba bagqithe kwiqondo lobushushu eliyi-1,382°F [750°C].Ubushushu obugqithisileyo buvelisa ukuguga okukhawulezayo, kuba ukwandiswa kobushushu phakathi kwe-binder kunye nedayimani kudla ngokuqhekeza iikristale zegrit yedayimani ezikhulayo kwitafile yedayimani.Amandla ebhondi phakathi kwetafile yedayimane kunye ne-tungsten carbide substrate nazo zisengozini ngokwandiswa kwe-thermal.