TAP CHi HOA HOC TAP 49(1), 79-83 THANG 2 NAM 2011<br />
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CONG NGHE MA XOA VOI NANO COMPOZIT Ni-TIOz, SiC<br />
D^o Khanh Du, Nguyin Duy Ket, Nguyen Diic Hiing<br />
Viin Hda hpc - Vdt Hiu, Viin Khoa hpc Ky thudt Qudn su<br />
Din Tda soan 31-5-2010<br />
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<br />
Abstract<br />
The bmsh electroplating not only recovers defective areas of machine parts caused by abrasion but also improves<br />
the quality of plating surfaces better by using this composite plating solution with inert and rigid particles, especially the<br />
nanoparticles such as TiO:, SiC. The purpose of this article was to determine the solution compositions Ni-Ti02, Ni-SiC<br />
plating in order to enhance the efficiency and the physico-mechanical properties of plating layers. Results showed that<br />
using of solution NiCb, NH4CI, (NH4)3C6H507 with nanoparticle Ti02 (5.5 g/I), SiC (4.2 g/I) the plating rate can be<br />
increased to 100 mA/dm^ and the efficiency as well as the physico-mechanical properties of plating layers was<br />
improved.<br />
<br />
I.MCJDAU Ti02, SiC: 1 - 6% (trgng lugng).<br />
Cdc chi tilt mdy boat ddng thudng xuyin se bj Cdc phuomg phdp nghiln ciiu:<br />
hao mdn do ma sat [1] ldm gidm do chinh xdc vd - Do dudng cong phdn cyc (DCPC) dugc thyc<br />
chat lugng ciia thilt bj ciing nhu sdn phdm do thilt hiln trin mdy Auto Lab 30 ciia Hd Lan vd chup dnh<br />
bj tao ra. Vi vdy din gidi ban hao mdn nhdt djnh se hiin vi diln tir quit (SEM) trin mdy Jenon 66110<br />
phdi thay thi hoac sira chiia phuc hdi nham gidm chi cua Nhdt Ban tai Vien Hda hgc - Vdt lieu.<br />
phi. So vdi cdc ky thudt phuc hdi chi tilt bj mai mdn Xdc djnh thanh phdn cdc chat ciia bl mat vat<br />
bang cdng nghe co nhilt nhu hdn dap, phun phu,... ma bdng phi EDX bang may IEOL-JSM-6490LV<br />
cong nghe ma diln hda, dac bilt cdng nghe ma tai Vien Khoa hgc Cdng nghe Viet Nam.<br />
"khong phai su dyng bi ma" [2] cdn dugc ggi Id "ma<br />
xoa" [3] cd nhiiu lgi thi vi ddu tu, tiit kilm thdi Do Cling tl vi dugc xdc djnh trin mdy do do<br />
gian thdo gid, khdng cdn van chuyin din xudng ma. Cling hiin vi quang hgc HX 1000 cua Trung Qudc<br />
Vi vdy ma phuc hdi chi tiit mdy hu hdng bang cdc tai Vien Cdng nghe Tdng cue CNQP.<br />
kim loai nhu ddng, niken, crdm da trd nin phd biln<br />
[3 - 5]. Dl tang tinh chdt ca ly cua ldp ma phyc hdi, 3. KET QUA VA T H A O LUAN<br />
ma td hgp vdi cdc hat tro, ciing, dac bilt cdc hat cd<br />
kich thudc nano nhu Si02 [6], Tib2 [7], AI2O3 [8] Anh hudng ciia ndng do cdc thdnh phdn dugc su<br />
cacbon graphit [9] hoac SiC [10] dang dugc nghiln dyng trong dung djch ma niken tdc do cao vdi cdc<br />
ciiu bang cdng nghe ma xoa. Nham triln khai vdo chat NiCl2, NH4CI, (NH4)3C6H507 dugc tiinh bdy tai<br />
thyc tien cho cdng nghe chl tao mdy d Viet Nam, hinh 1. Kit qud tir hinh 1 cho thdy, khi ndng do cdc<br />
bai bdo trinh bdy khd nang tang tdc do ma xoa bang thdnh phdn tiong dung djch ma tang diu thay ddi<br />
dung djch composit Ni-SiC. phdn cyc catdt Id co sd dk diiu khiln kha ndng ma.<br />
Khi ndng do NiCl2 nhd (250 g/l) lugng chdt tao<br />
phiic: NH4CI va (NH4)3C6H507 du, cdc phiic cua<br />
2. PHUONG PHAP NGHIEN CUtJ niken bin vimg, khd phdng diln nin do phdn cyc<br />
ldn. Khi tang ndng do NiCl2 trong khodng 350 din<br />
Cac hod chdt tinh khiit phdn tich (PA): 450 g/l tuomg ling vdi do bin ciia phiic tuomg ddi dn<br />
NiCl2.6H20, NH4CI, (NH4)3C6H507, su dung dk djnh, cdc dudng cong phdn cyc thay ddi it.<br />
nghiln cuu dugc nhap tii Trung Qudc cdn hat Ti02,<br />
Sic vdi kich thudc trung binh 10 nm dugc nhdp tir Khi tdng ndng do NiCl2 tdi 550 g/l chdt tao phiic<br />
Merk. Diln cyc andt tra Ti/Ru02 dugc chi tao tir bj thiiu, phiic ciia niken kim bin nin do phdn cyc<br />
hoa chdt RuCls cua hang Mecrk [11]. Thdnh phdn gidm, vi vay niu ma d ndng do ndy Idp ma se thd.<br />
cua dung djch ma xoa dugc chgn Id: Tir vj tri cdc DCPC cho thdy ndng do NiCl2 phu hgp<br />
NiCb.dHzO: 250 - 550 g/I, ndm trong khodng 450 -H 500 g/l.<br />
Trong dung djch ma da chgn, Ni^"^ nam d 2 dang<br />
-NH4CI:80-550g/I,<br />
phuc vdi amoni vd xitrat, tiong dd hang sd bin cua<br />
- (NH4)3C6H507: 30 - 80 g/I, phiic niken vdi xitiat cao hom nin ty II cua chiing tiong<br />
79<br />
TCHH, T.49 (1), 2011 Cdng nghi mg xoa vdi...<br />
<br />
dung djch cunp cao hom. Trong khodng ndng do todn bg ion Ni^^ da tao phiic hit thi se xdy ra su chuyin<br />
NH4CI tii 45 den 90 g/l do lugng xitiat chua du tao djch ndng dg phiic gitta niken tiong phiic xitiat bin<br />
phirc hit vdi Ni nin mgt phdn ion Ni ndm d tiang hom sang niken frong phirc amoni kim ben lam gidm<br />
thai ty do, cd do phdn cyc nhd nin tang ndng dg phdn cyc. Ndng dg NH4CI cdng cao cdng lam gidm<br />
NH4CI se tang lugng phirc cua niken vdi amoni vd tang phdn cyc nen nong dg amoni clorua hgp ly dugc chgn<br />
phan cyc. Khi tiip tyc tang nong dg NH4CI den khi Id 120 g/l img vdi ndng dg NiCl2 Id 500 g/l.<br />
<br />
<br />
<br />
-OOM<br />
E . -0.08 -0,14 • C.H.7N.O, 20<br />
u Ni350 E • NH.CI 49<br />
—• NI2S0 u -0,07 — NH.CI to -012<br />
C,H,rN.O7 40 /<br />
NH.C1110 c.H.,N,o,ao .•<br />
£ -0 06 NI450<br />
NIS50<br />
.' . -0,06 NH