Tshwj xeeb zoo li tus hniav nyiaj hniav kub sib tsoo lub log cuab tam

Vim lub siab lub zog ntawm pob zeb diamond thiab cov hlau dav dav thiab cov hlau, cov pob zeb diamond tawg tsis tuaj yeem cuam tshuam los ntawm dav dav qis melting point alloy, nrog kev sib xyaw tsis zoo. Hauv kev tsim cov tshuab thev naus laus zis, pob zeb diamond sib tshooj tsuas yog tso siab rau cov neeg kho tshuab clamping quab yuam los ntawm qhov txias me me ntawm lub ntsej muag kom inlay hauv cov hlau txuas ntawm qhov loj, tab sis tsis tsim cov khoom lag luam sib xyaw lossis cov hlau sib xyaw, uas ua rau cov pob zeb diamond tau yooj yim cais tawm los ntawm matrix hlau puag hauv kev ua haujlwm, uas txo cov kev pabcuam lub neej thiab kev ua tau zoo ntawm pob zeb diamond cuab yeej. Hauv feem ntau cov cuab yeej impregnated, kev siv tus nqi ntawm lub pob zeb diamond tsawg, thiab ntau tus ntawm cov pob zeb kim tau ploj hauv cov khib nyiab pov tseg. Lin Zengdong coj txoj hauv kev siv cov pob zeb diamond nto metallization technology los ua tiav pob zeb diamond nto nrog ntau yam ntxwv tshiab, xws li cov thermal conductivity zoo, thermal stability zoo, txhim kho nws lub cev qub thiab tshuaj zoo, txhim kho nws qhov ntub dej kom hlau lossis alloy tov, thiab lwm yam.
Kev sib tsoo ntawm pob zeb diamond nto tau nyiam cov xim pob zeb diamond tuam tsim khoom hauv tsev thiab txawv teb chaws txij li xyoo 1970 los. *** Txawm hais tias nws tau ua pov thawj tias qee cov hlau xws li tungsten (tsis oxidized) tuaj yeem tsim WC txheej rau saum npoo ntawm pob zeb diamond rau qhov ntsuas kub tsawg dua (li 800 ℃), qhov zoo tshaj plaws ua kom sib zog yuav tau txais los ntawm cua kub rau 1 teev hauv qab nqus tsev thiab saum toj no 600 ℃ raws li cov txheej txheem tau siv los kom paub pob zeb diamond nto ua ntej metallization. Raws li cov kev ua txhaum sintering ntawm cov cuab yeej siv feem ntau ua pob zeb diamond txiav cov cuab yeej, nws tsis zoo li tias txheej metallized yuav tsim rau ntawm lub pob zeb nplaim yog tias nws tau kho rau li 5 feeb ntawm 900 ℃ hauv lub tshuab nqus tsev lossis tsis nqus. Vim hais tias hais tias lub zog hlau atoms (Ti, V, Cr, thiab lwm yam) yog enriched ntawm pob zeb diamond nto lossis qhov cuam tshuam kev sib tshuam mus txog metallurgical ua ke ntawm daim ntawv cog lus thiab pob zeb diamond yog cov txheej txheem atomic diffusion. Raws li qhov ntsuas kub siv rau kub nias thiab xws li luv luv, txoj kev no tsis tshua txaus. Nyob rau hauv cov xwm txheej ntawm cov khoom theem sintering (qee zaum muaj qee qhov me me ntawm lub zog tsis tshua muaj zog thiab qis melting point hlau lossis alloy kua theem), tshuaj sib txuas lossis metallurgical sib txuas lub zog ntawm matrix rau pob zeb diamond yog qhov muaj zog heev lossis yuav tsis tsim txhua.
Qhov ua ntej metallization ntawm pob zeb diamond nto tsis yog lub hom phiaj siab tshaj plaws, tab sis tsuas yog ib qho ntawm kev ntsuas kom paub cov tshuaj lom neeg hlau ua ke nrog matrix hlau. Tom qab cov pob zeb coated tau sintered rau hauv kev pom (tho) cov hniav, lub pob zeb diamond nthuav tawm ntawm lub qhov pob txha lov ua rau poob lub txheej, thiab saum npoo ntawm cov pits seem yog du heev, uas zoo li qhia tau tias lub pob zeb diamond thiab matrix tsis tau mus txog qib uas tshuaj cladding. Yog li no, txawm hais tias qhov saum npoo ua ntej metallization ntawm pob zeb diamond tau pom tau hais tias, cov tsoos khoom-theem hmoov metallurgy sintering txoj kev tsis tuaj yeem paub cov khoom sib xyaw ntawm pob zeb diamond thiab cov khoom siv matrix.