Phan Quang The va cs Tap chi KHOA HOC & CONG NGHE 78(02): - ANH HirOfNG CUA THONG SO QUA TRINH T I D O ClTNG TE VI CUA LOfP MA COMPOSITE ,, , Phan Quang Thi*, Nguyen flang Binh, TrSn Minh Diic, Ly Viet Anh Trudng Dgi hgc Ky thuat Cong nghiep - DH Thai Nguyen TOM TAT Mot nhirng bien phap dk tang kha nang chdng mon ciia lop ma composite tren nen Ni la thay d6i thong s6 qua trinh dl tang cung tk vi ciia lop ma Ket qua nghien ciiu ma composite AI2O3 va Ti02 tren nen Ni chi rSng ciing tk vi cua lop ma composite phu thuoc dang ke vao toe khuay, mat dong dien va nhiet cua dung djch dien phan Thay doi cac thong so -•' qua trinh ma c6 the tao dugc lop ma composite co ciing te vi gap hon lan so vol lop cung te vi ciia lap ma Ni thong thuong :;;: Tu- khoa: Mg composite; NI-AI2O3; Thdng sd mg composite; Van tdc khudy; Do cimg te vl MO DAU Ma composite nham tao lop ma tren nen kim loai, hop kim, chat deo Lop ma composite tren nen Ni co ca tinh dac biet nham tang kha nang lam viec ciia cbi tiet may dieu kien mon va an mon Nguyen ly va CO che ma composite dugc neu ro cac tai lieu tham khao [1] Cac thong so qua trinh ma composite nhu mat dong dien, che dp xung, toe khuay, nhiet dung djch dien phan, pH co anh huong true tiep den cau triic va co tinh ciia lop ma composite [2] Mat dong dien dugc xac dinh theo cong thu-csau:CE= 100.WA.,/WTheo - CE la mat dong dien - WACI - Wiheo la khoi luong ma ly tuong tinh theo djnh luat Faraday la khoi lugng thuc ciia lop ma Mat dong dien co the la mot thong so dugc khao sat rong nhk Mat dong dien co anh huong rk it hoac gan nhu khong co anh huang den s6 cac hat bam vao lop ma E)6i voi be Ni-Ti02 a toe khuSy cao thi diem cue dai ciia phSn cac hat bam vao lop ma se dich chuyen v^ phia mat dong dien cao Tuong tu vai he Cr-AhO., thi mat cac hat trung tinh be ma tang len thi mot dilm cue tieu dugc tao nen ve phia mat dong dien thap [2] ' Tel: 0912064824; Email: phangthefdlmit.edit.vn Ngoai viec van chuyen cac hat, viec khuay cung CO tac dung giiJ cac hat lo' liing va on dinh su la lung ciia cac hat Ca viec khuay dung dich dien phan va tron hat ciing voi dung dich dien phan deu co tac dung lam tan cac cue cac hat trung tinh von lai De tao nen su dong deu cho lop ma, dung djch huyen phu cSn chiia nhQng hat inin phan tan [3,4] Anh huong ciia nhiet duong nhu khac doi voi cac he ma composite Voi he NiAI2O3, anh huong cua nhiet toi phan tram cac hat tham gia vao lop ma la khong dang ke Tuy nhien, phan graphite lop ma Cr tang len cung nhiet toi 50°C Trong Cr- AbOj tbi ngugc lai hoan toan nghTa la cac hat ciing tham gia vao lop ma giam tang nhiet tai 50°C Trong ca hai truang hgp tac dung cua nhiet tang tren 50°C co the bo qua Doi vai he Ni-V205 phan hat ciing tham gia vao lop ma la lon nhat a 50°C Phan tram khoi lugng cac bat cung tham gia vao lop ma Cu giam lien tuc tang nhiet [3,5] Anh huong cua toe khuay, mat dong dien, nhiet dp ma den dp ciing te vi cua lop ma composite AbO^ va Ti02 tren nen Ni dieu kien phong thi nghiem tai truang Dai hgc Ky thuat Cong nghiep dugc trinh bay duai day THi NGHIEM Thiet bj thi nghiem Thiet bj ma composite tren nen Ni nhom nghien ciiu tu thiet ke va che tao bao gom be chiia dung dich dien phan dung tich 60 lit, he 78(02): 3-7 Tap chi KHOA HOC & CONG NGHE Phan Quang The vd cs thdng gia nhiet tu dgng dong ngat dien co the nang va on djnh nhiet dp ciia dung dich toi 80°C, he thong dieu khien tu dong cung cap dong mpt chieu xung hoac lien tuc cho be ma, he thong khuay ca hpc co the dieu chinh vo cap toe khuay tu 10 v/p den 350 v/p Hoa chat - Thay doi mat dp dong dien: 3A/dm^, 5A/dm^ 7A/dmNhiet dp ma 40°C, t6c dp khuay 210 v/p - Thay d6i nhiet dp ma: 35°C, 40°C, 45°C Toe dp khuSy 210 v/p, mat dp dong dien 5A/dm^ - Thay doi toe dp khuay tu 140 v/p den 245 v/p Truoc ma dung djch huyen phu dugc khuay bSng may khuay sieu am SW3H ciia Thuy sy 30 phiit, sau khuay ca hoc be ma gia M I U ma composite la thep 09CrSi, toi dat Cling HRC = 58-60, dang hinh tru kich thuoc d = 26 mm, h = 10 mm dugc danh bong, sau lam sach, riia be hon hgp axit loang d nhiet moi truong truac ma Trong qua trinh ma, dung djch huyen phu dugc khu§y CO hgc voi toe neu tren thdi gian 1,5 gid Sau ma, mau dugc rua nude chay, sau dugc rua sieu am nude cat khoang 10 phiit KET QUA THI NGHIEM Chieu day lap ma tren chi tiet tren kinh hien vi quang hgc dat dugc tii- 50pm -^ 70 pm Mau dugc mai tren giay nhap cd 800, 1000, 1200 sau danh bdng tren may danh bdng kim loai hpc cua Dai Loan bang bdt kim cuo-ng pm sau dd tam thuc dung djch Nital 2% thdi gian phiit Dp ciing te vi ciia lap ma dugc tren may do cung te vi Future fm 700e ciia Nhat, tai trgng 10 gram cho ket qua tren bang 2, 3, Nhiet dp ma 40°C, mat dp dong dien 5A/ dm' a Lap mg composite Cac hoa chat su- dung cho qua trinh ma composite Ni liet ke bang Sodium dodecyl sulfate dugc sii' dung la chat phu gia de tang hoat tinh be mat cua cac hat trung tinh Hat trung tinh sir dung thi nghiem la AI2O3 vai co hat < pm, TiOa voi cohat < 300 nm va co chung ham lupng la 50g/l Che va qua trinh chuan bj Qua trinh ma dugc thuc hien voi dp pH ciia dung djch khoang tir + 4,5 (do pH dugc dieu chinh bang each cho them NH3 hoac axit HCl loang); tan so xung sii dung thi nghiem la 200 Hz; ty le xung thuan/ nghich la 80% a Che mg Ni-Al203 - Thay d6i tdc khuay tu- 140 v/p den 312 v/p Nhiet dp ma 40°C, mat dong dien 5A/ dm" - Thay doi mat dp dong dien: 3A/dm , 5A/dm^ 7A/dm^ Nhiet dp ma 40°C, t6c dp khuay 210 v/p - Thay doi nhiet ma: 35°C, 40°C, 45°C, 50°C Mat dp dong dien 5A/dm^, toe dp khuay 210 v/p b Chd mg Ni-Ti02 Ni-A^Os Bang Cac boa chat sir dung cho qua trinh ma composite Al203-Ni va Tib2-Ni NiS04.6H,0 (g/1) 300 Hoa chat Ham lugng NiCU.eHjO (g/1) 50 H3BO3 (g/1) 40 Sodium dodecyl sulfate (g/1) 0,1 Bang Do cung tl vi cua lop ma Ni-Al203, thay doi toe khuay til' 140 v/p den 312 v/p, nhiet ma 40°C, mat dong dien 5A/dml ,;: ';, Lan Ni Trung binh 154 184 170 170 Ni-ALO, 140 v/p 225 230 200 218 Ni-Al203 175 v/p 280 260 290 273 Ni-Al203 210 v/p 280 270 270 273 Ni-Al203 245 v/p 300 300 310 303 Ni-AlzOj 278 v/p 300 250 220 256 Ni-ALO, 312 v/p 200 210 310 240 Phan Quang Thi va cs Tap chi KHOA HOC & GONG NGHE 78(02): Bang Do cirng te vi cua lop ma Ni-AbOs, thay doi mat dong dien: A/dm", 5A/dm-, 7A/dm" nhiet ma 40°C, toe khuay 210 v/p Lan Ni N i-ALO, A/dm- Ni-ALOj 5A/dm- Ni-AbO, 7A'dm- 154 184 170 170 250 210 160 206 280 270 270 273 170 200 200 190 Trung binh Bang D oCling te vi cualop maNi-Al203, thay i d6i nhiet m a 35°C, 40°C,45°C, 50°C, mat dong dien 5A/dm^,, toe khuay210 v/p Lan Ni Ni-ALO; 35°C Ni-ALOs 40°C Ni-ALOj 45°C Ni-ALOj 50°C 154 114 170 170 300 160 160 206 280 270 270 273 420 380 350 383 290 300 280 290 Trung binh Bang Do cung te vi ciia lop ma composite Ni-Ti02 thay d6i toe khuly tu 140 v/p din 245 v/p, nhiet ma 40°C, mat dong dien A/ dm" Lan Ni Ni-TiOj 140 v/p Ni-TiOj 175 v/p Ni-Ti02 210 v/p Ni-Ti02 245 v/p 154 184 170 170 240 235 222 232 250 230 250 243 225 240 230 230 160 213 200 191 Trung binh Bang Do ciing te vi ciia lop ma composite Ni-TiOi thay doi mat dong dien: 2A/dm", 3A/dm" 5A/dm^ 7A/dm- nhiet ma 40°C, tdc khuSy 210 v/p Lan Ni Ni-TiOj 2A/dm^ Ni-Ti02 3A/dm^ Ni-TiO, A/dm- Ni-Ti02 7A/dm^ 154 184 170 170 270 300 290 286 300 350 300 316 225 240 230 230 270 260 290 273 Trung binh Bang Do ciing te vi ciia lop ma composite Ni-TiO: klii thay doi nhiet ma: 35°C, 40°C, 45°C, toe khuay 210 v/p, mat dong dien A/dm" Lan Trung binh : 1-:, Ni Ni-Ti02 30°C 154 184 170 170 270 260 250 260 b Lap mg composite Ni-Ti02 Cac ket qua do cung te vi HV|o ddi vdi Idp ma composite AI2O3, Ti02 cho thay tdc khuay, mat dp ddng dien va nhiet dung dich ma cd anh hud-ng dang ke tdi dp cirng te vi ciia Idp ma composite Ni-Ti02 35°C Ni-Ti02 40°C 330 225 380 240 330 230 346 230 PHAN TICH KET QUA Ni-TiO, 45°C 300 350 300 316 Tu- cac ket qua thi nghiem cho thay anh hudng cua tdc dp khuay den dp ciing te vi ciia Idp ma composite la dang ke nhien miic dp anh hudng la khac Anh hirdng ciia tdc khuay, vdi Idp ma NiAI2O3, tang tdc dp khuAy tii- 140 v/p dp Phan Quang The vd cs Cling tang dan tu HV]o=218, dat cue dai tai tdc dp 245 v/p vdi HV|o= 303 sau dd giam den HV|o=240 tai toe dp khuAy 312 v/p Vdi lap ma Ni-Ti02, tang tdc dp khuay tu 140 v/p dp cung tang tu HV|o=232 dat cue dai tai tdc dp 175 v/p vdi HVio=243 sau dd giam den HV,0=191 tai tdc dp khuAy 245 v/p (Hinh 1) Anh hudng ciia mat dp ddng dien, vdi Idp ma Ni-Al203, klii tang mat ddng dien tii' 3A/dm" den 7A/dm" cirng tang tu' HV|o=206 dat gia tri cue dai HV|o=273 tai mat ddng dien 5A/dm" sau dd giam den gia tri HVio=190 Vdi Idp ma Ni-TiO^, ciing te vi dat gia tri cue dai HVio=316 tai mat dp ddng dien A/dm" va giam den HV]o=273 tai mat ddng dien 7A/dm" (Hinh 2) Ve anh hudng cua nhiet do, ddi vdi Idp ma Ni-ALOs, dai nhiet tir 35°C den 50°C, Cling te vi dat gia tri cue dai HV|o=383 tai nhiet 45°C Tuy nhien vdi Idp ma Ni-Ti02, ciing te vi dat gia tri circ dai HV|o=346 tai nhiet dp 35°C (Hinh 3) Cac ket qua tbi nghiem cho thay anh hudng ciia nhiet dp ma den dp ciing te vi la Idn nhat, thay ddi nhiet khoang ndi tren cd the tang Cling len 125% ddi vdi lap ma NiAI2O3 va 104% ddi vdi lop ma Ni-Ti02 Doi vdi Idp ma Ni-Al203, anh hudng ciia tdc khuay den cii-ng te vi Idn hon cua mat ddng dien (78% va 43% vdi lap ma Ti02) Tuy nhien, ddi vdi Idp ma Ni-Ti02, anh hudng cua mat ddng dien den dp ciing te vi Idn ban anb budng ciia tdc dp khuay (86% ^a 60% ddi vdi Idp ma AI2O3) cu'ng te vi l a p m a c o m p o s i t e phu t h u o c toe d o k h u ^ y 300 X 250 '=• 200 / ^ *""""* A - - " " ^ ^ ~ ^ " ^ ^'-•.^ ~~* = 150 -»-Ni-AI203 ^»-Ni-'n02 c •5 100 ' 50 140 \/p 175 \/p 210 \/p 78(02): - Tap chi KHOA HOC & CONG NGHE 245 \/p 278 \