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1 24 6 V o l 24, N o TR IBOLO GY N ov, 2004,,, (, ) : MM 2200 (PT FE) M os2 (P I) GC r15, X P I, PT FE M os2 P I, P I+ 30%M os2, P I 50%. P I+ 10% PT FE+ 20%M os2, P I, P I+ 20% PT FE+ 10%M os2, P I 1. P I,, P I : ; ; ; : TH : A : (2004) (P I),,, [1 ]., P I, (PT FE) (Gr) [2 ] (CF) [3, 4 ] [5, 6 ] P I, P I (M os2), [7, 8 ]. 2,, P I2 PT FE2M os2, PT FE M os2, P I YS220, 120 M Pa, 88 Λm. PT FE SM 021 (F), PT FE, 35 Λm. M os2 2 M os2, 30 Λm. P I PT FE M os2,,. P I, 6 mm 7 mm 30 mm ( 1 2) MM 2200 P I <40 mm GC r15, # R a= 2. 3 Λm. : m gs, 120 m in. 60 m in ; mm, JSM 25600LV (SEM ) P I, EDA X9100 X (EDXA ) : ; : g, e2m ail: zzzhang@ns. lzb. ac. cn. :,, 1965,,,.
2 6 : N PT FE P I, PT FE P I, P I+ 30% PT FE P I+ 10% PT FE P I+ 40% PT FE 1 PTFE P I Table 1 Effect of PTFE con ten t on the fr iction coeff ic ien t and wear rate of P I composites Compo sites F riction coefficient Λ W ear rateg10-6 mm 3 (N m ) - 1 Pure P I P I+ 10% PT FE P I+ 20% PT FE P I+ 30% PT FE P I+ 40% PT FE , P I P I 70%, P I 2. 2 P I 2 P I 200 N, 2 P I Table 2 The results of the fr iction coeff ic ien t and wear rate of P I composites Samp le num ber Samp le compo sition F riction coefficient Λ W ear rateg10-6 mm 3 (N m ) - 1 Samp le 1 Pure P I Samp le 2 P I+ 30% PT FE Samp le 3 P I+ 20% PT FE+ 10%M os Samp le 4 P I+ 10% PT FE+ 20%M os Samp le 5 P I+ 30%M os PT FE M os2 P I, P I+ 30%M os2, P I 50%. P I+ 10% PT FE + 20%M os2, P I, P I+ 20% PT FE + 10%M os2, P I 1 P I+ 30%M os2 1 P I F ig 1 V ariation of friction coefficien t and w ear rate of P I compo sites w ith load 1 P I, P I+ 30%M os2, (300 N ) 0. 1, [ 1 (a) ];, P I+ 30%M os2 P I+ 30% PT FE P I+ 20% PT FE + 10%M os2, P I+ 20% PT FE + 10%M os2, 250 N,
3 [ 1 (b) ]; P I + 30%M os2. ( 250 N ), P I+ 30%M os2 P I+ 30% PT FE P I+ 20% PT FE+ 10%M os2, ( 250 N ), P I+ 30%M os2 P I+ 30% PT FE P I+ 20% PT FE + 10% M os N F ig 2 SEM mo rpho logy of the w o rn su rfaces of P I compo sites (800 ) 2 P I SEM ( 800) F ig 3 Fe distribu tion of w o rn su rface of P I compo sites (250 ) 3 P I Fe ( 250) F ig 4 S (C fo r pure P I) distribu tion on the coun terpart su rface again st P I compo sites (250 ) 4 P I S ( P I C ) ( 250)
4 6 : 525 P I SEM., P I [ 2 (a) ], Fe [ 3 (a) ], P I ; C [ 4 (a) ], P I, [ 2 ]. P I+ 20% PT FE+ 10%M os2, [ 2 (b) ], Fe [ 3 (b) ], S [ 4 (b) ], P I+ 20% PT FE + 10%M os2, 2 2, ( 2)., P I+ 30%M os2 [ 2 (c) ], Fe [ 3 (c) ], S [ 4 (c) ]., P I+ 30%M os2,, [ 2 ]. P I+ 10% PT FE+ 20%M os2 [ 2 (d) ],,, P I, P I ;, 3 a. PT FE P I ; P I PT FE 30%, P I2PT FE b. PT FE M os2 P I, P I+ 30%M os2, P I 50% ; P I+ 10% PT FE + 20%M os2, P I, P I + 20% PT FE + 10%M os2, P I 1 ; P I+ 30%M os2 c. P I, P I : [ 1 ],,,. [J ]., 2002, 30 (1) : 629. Yan H X, Huang Y, Ge Q, et al. Developm ent of advanced P I2based compo sites[j ]. N ew Chem icalm aterials, 2002, 30 (1): 629. [ 2 ],,. [J ]., 1999, 26 (4) : H uang L, Xu D Y, Cheng H Y. po lyim ide compo sites [ J ]. Chem ical T echno logy, 1999, 26 (4) : Study on the p roperty of Journal of Beijing U niversity of [ 3 ],,,. [J ]., 2002, 22 (4) : J ia J H, Zhou H D, Gao S Q, et al. T he tribo logical behavio r of carbon fiber reinfo rced po lyim ide compo sites under w ater lubrication[j ]. T ribo logy, 2002, 22 (4) : [ 4 ],,,. g [ J ]., 2003, 21 (2) : J ia J H, Gao S Q, Chen J M, et al. T ribo logical p roperties and w ear m echanism of PTFE and carbon fiber reinfo rced P I compo sites[ J ]. 2003, 21 (2) : Journal of M aterials Science & Engineering, [ 5 ] Cai H, Yan F Y, Xue Q J, et al. Investigation of tribo logical p roperties of A l2o 32po lyim ide nanocompo sites [ J ]. Testing, 2003, 22 (8) : Po lym er [ 6 ],,,. Si3N 4 [J ]., 2001, 21 (6) : Yan H X, N ing R C,M a X Y, et al. F riction and w ear behavio r of nanom eter Si3N 42filled bism aleim ide compo sites [ J ]. T ribo logy, 2001, 21 (6) : [ 7 ] J ia J H, Zhou H D, Gao S Q, et al. A comparative investigation of the friction and w ear behavio r of po lyim ide compo sites under dry sliding and w ater2lubricated condition [ J ]. M aterials Science & Engineering (A ), 2003, 356 (122) : [ 8 ],. [ J ]., 2004, 24 (1) : L iu G D, L i H L. Effect of po lyp ropylene and mo lybdenum disulfide on friction and w ear behavio r of ultra h igh mo lecular w eigh t po lyethylene[j ]. T ribo logy, 2004, 24 (1) :
5 Study on the Fr iction and W ear Properties of Poly im ide Com posites F illed with Polytetraf luoroethylene and M os2 ZHU M in, ZHAN G Zhao2zhu, W AN G Kun, J IAN G W ei (S tate K ey L aboratory of S olid L ubrication, L anz hou Institu te of Chem ical P hy sics, Ch inese A cad em y of S ciences, L anz hou , Ch ina) Abstract: T he frict ion and w ea r p rop ert ies of the po lyim ide ( P I) com po sites filled w ith po lytet ra2 fluo roethylene (PT FE) and mo lybdenum disu lfide (M os2) particu lates sliding again st GC r15 steel under dry friction condition w ere studied u sing an MM 2200 ring2on2b lock friction and w ear tester. T he w o rn su rfaces of the P I compo site b lock s and the coun terpart steel rings w ere ob served u sing a scann ing electron m icro scope and energy dispersive spectro scope. It w as found that PT FE and M os2 as the fillers con tribu ted to imp rove the friction and w ear behavio r of P İ N am ely, all the filled P I compo sites excep t fo r P I+ 10% PT FE+ 20% M os2 show ed m uch better w ear2resistance than the unfilled P I, fo r examp le, the P I+ 20% PT FE+ 10%M os2 compo site registered a w ear rate sm aller than that of the unfilled P I by 1 o rder of m agn itude, and the filled P I com po sites had sm a ller frict ion coefficien t s than the unfilled P I a s w ell. M o reover, the P I + 30%M os2 compo site show ed the best friction2reducing and an tiw ear behavio r among all the compo sites tested, w h ich indicated that the ino rgan ic and o rgan ic comp lex fillers did no t necessarily have synergistic effect in term s of their ab ility to imp rove the friction and w ear behavio r of P İ T he imp roved friction and w ear behavio rs of the filled P I com po sites w ere clo sely rela ted to the cha racterist ics of their t ran sfer film s fo rm ed on the coun terpart steel su rface. T he compo sites capab le of fo rm ing the tran sfer film w ith p roper th ickness and even distribu tion had better friction and w ear behavio rṡ Key words: PT FE; M os2; po lyim ide compo site; friction and w ear behavio r Author: ZHAN G Zhao2zhu, m ale, bo rn in 1965, Ph. D., R esearch P rofesso r, e2m ail: zzzhang@n s. lzb. ac. cn
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41 Vol.41, No. 01 RARE METAL MATERIALS AND ENGINEERING March 01 Pb O 4 PbO ( 710049) SnO -Sb Pb O 4 Pb O 4 100.5 h 970 h XRF XRD SEM Pb O 4 PbO PbO TG146.1 + A 100-185X(01)0-046-05 [1,] 1 PbO PbO Sn-Sb
17 1 V o l. 17 N o CH IN ESE JOU RNAL O F COM PU TA T IONAL M ECHAN ICS February 2000 : A
7 V o l. 7 N o. 000 CH IN ESE JOU RNAL O F COM PU TA T IONAL M ECHAN ICS February 000 : 0074708 (000) 000808 Ξ, (, 0098) :,,,,,,, N ew tonr aph son,, : ; ; ; : TU 3933; O 48 : A 80, [, Geiger Fu ller ],
, 3. EXPER IM ENTAL STUDY OF XENOGENE IC HEART VAL VE M ATER IAL gs H I K ai2hu, ZH A N G X i, ZH A N G
496 2 1# 1 2 2 4 8, 4 : 1 (GA ), 2 (EC), 3 + (EC+ L 2GA ), 4 + + (EC+ L 2 GA + CE) (6 ), M 199 (10% + 20% + + ),, g : 1, 2, 3 4 (P < 0. 01) : 1 ; 2 ; 3 ; 4,,,,,,, EXPER IM ENTAL STUDY OF XENOGENE IC HEART
M in ing Recursive Function s Ba sed on Gene Expression Programm ing
39 5 ( ) Vol. 39 No. 5 2007 9 JOURNAL OF SICHUAN UN IVERSITY ( ENGINEER ING SC IENCE ED ITION) Sep t. 2007 : 100923087 (2007) 0520127206 1, 2, 1, η 1, 3, 1, 1, 1, 2 (1., 610065; 2., 610074; 3., 610041)
Conductivity Logging for Thermal Spring Well
/.,**. 25 +,1- **-- 0/2,,,1- **-- 0/2, +,, +/., +0 /,* Conductivity Logging for Thermal Spring Well Koji SATO +, Tadashi TAKAYA,, Tadashi CHIBA, + Nihon Chika Kenkyuusho Co. Ltd., 0/2,, Hongo, Funabashi,
D EM, ], 1969 F reeze H arlan : SH E G IS Tsinghua Tongfang Optical Disc Co., Ltd. All rights reserved.
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21 5 2002 9 V o l. 21, N o. 5 PRO GR ESS IN GEO GRA PH Y Sep., 2002 : 100726301 (2002) 0520430210 D EM 1, 1, 2 3, (11, 100101; 21, 450002; 31, 430072) : D EM ( 3S ),, D EM,, ;,,, : ; D EM ; ; ; : P333
Experiment on axial compressive properties of high2strength concrete column wrapped w ith CFRP
29 1 2010 3 Vol129 No11 GLOBAL GEOLOGY Mar1 2010 : 1004 5589 (2010) 01 0144 06 CFRP 1, 1, 2, 3 1., 130026; 2., 150090; 3., 071051 : 19 CFRP, : 1 3 CFRP 11% 21% 42%, 23% 271% 330% CFRP : CFRP; ; ; : TU528
VSC STEADY2STATE MOD EL AND ITS NONL INEAR CONTROL OF VSC2HVDC SYSTEM VSC (1. , ; 2. , )
22 1 2002 1 Vol. 22 No. 1 Jan. 2002 Proceedings of the CSEE ν 2002 Chin. Soc. for Elec. Eng. :025828013 (2002) 0120017206 VSC 1, 1 2, (1., 310027 ; 2., 250061) STEADY2STATE MOD EL AND ITS NONL INEAR CONTROL
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(2006) 65 Practical guidelines for m echan ical ven tilation (2006) S ociety of C ritical Care M ed icine Ch inese M ed ical A ssociation Corresp ond ing au thors: Q IN Y ing 2z h i (D ep artm ent of Intensive
D NA , ) SCGE DNA.
14 5 V o l114,n o15 1998 10 Ch inese Jou rnal of B iochem istry and M o lecu lar B io logy O cṫ 1998 SCGE D NA (, (, 030006) 030006) (SCGE) ; SCGE Χ DNA, Χ DNA, :,DNA,, Pr inc iple and M ethod of the Single
Appendix B Table of Radionuclides Γ Container 1 Posting Level cm per (mci) mci
3 H 12.35 Y β Low 80 1 - - Betas: 19 (100%) 11 C 20.38 M β+, EC Low 400 1 5.97 13.7 13 N 9.97 M β+ Low 1 5.97 13.7 Positrons: 960 (99.7%) Gaas: 511 (199.5%) Positrons: 1,199 (99.8%) Gaas: 511 (199.6%)
Power allocation under per-antenna power constraints in multiuser MIMO systems
33 0 Vol.33 No. 0 0 0 Journal on Councatons October 0 do:0.3969/.ssn.000-436x.0.0.009 IO 009 IO IO N94 A 000-436X(0)0-007-06 Power allocaton under er-antenna ower constrants n ultuser IO systes HAN Sheng-qan,