火焰法高钴YG系硬质合金表面沉积复合碳材料

22

6

Vol.22No.6December2008

2008

12

CHINESEJOURNALOFMATERIALSRESEARCH

YG

1

1

2

1

1.5104102.

510080

C2H2

O2

YG

,

YG8YG16

;

SEMXRD

Raman

:

.

YG8

,

;

20min

YG16

.

,

,

,

,YG8

,YG16

TB34,TB332,TB742

1005-3093(2008)06-0664-09

DepositcarboncoatingsonhighCoYGcementedcarbidewith

combustion ame

TANGDewen1

CHENGXiaoling1

KUANGTongchun2

WANGChengyong1

1.SchoolofElectricalandMechanicalEngineering,GuangDongUniversityofTechnology,GuangZhou510090

2.ExperimentCenter,SouthChinaUniversityofTechnology,Guangzhou510641

*SupportedbyNaturalScienceFoundationofGuangdongProvinceNo.2004B10301032.ManuscriptreceivedMarch26,2008;inrevisedformMay10,2008.

**Towhomcorrespondenceshouldbeaddressed,Tel:(020)39322206,E–mail:ktcgdut@

ABSTRACTC2H2andO2of amewasusedtodepositcarboncoatingsonhighCoYGseriescementedcarbidesurface.thein uenceofacidcorrodedCoYG8,YG16anddepositiontimehavebeeninvestigatedWiththemethodofXRD,SEM,Ramanandatomicmicroscope,carboncoatingsstructure,qualityandCrosssectionalmicrostructuresofcarboncoatingwasanalyzed.Theexperimentalresultshowthatafterdi erentacidcorrodedCotime,thetypicaldiamond/nanometercarbontubeanddiamond-graphite-nocrystalcarboncoatingshavebeenformedonthecementedcarbideYG8surface;afteracidcorrodedCo20time,nanometercarbontubehasbeenmainlyformedonthecementedcarbideYG16surfaceKEYWORDSfunctionalmaterials,diamond,carbonnanotubes, ame,Yg8cementedcarbide,Yg16cementedcarbide

[5]

[6 7]

C[8];2)

,

,

[9]

;3)

.

Co

[1]

.

(Co

,

)

;

Co

;

,

–

C

WC

,

.

:1)

(

)

[10]

.

[2 4]

:

Co

Co

Co

.

,

Co

*

Co

.

2004B10301032

.

2008

3

26

;2008

5

10

.

:

,

,

,

6

:

YG

665

Co

.

.

,

Co.

(

YG3,YG6)

1#2#3#4#

:

60#→260#→400#→600#

Co

→1000#

W2.5

YG8(WC–8%Co)YG16(WC–16%Co)

,

(

2.5μm

)

.

YG8YG16

Co

,

:

20%KOH+20%K3Fe(CN)6

,

Co

η

(Co6W6C

)

,

,

.

.

YG

WC

Co

,

1

WC

,

Co

,

:C2H2,

99.5%;O2,

99.5%;

Co

(CombustionFlameDe-:YG8

YG16.

position

CFD)

:

CFD

.

(1:3)

(

1),

:

Co

.

.

,C2H2

O2

,

,

;

,

,.

,

.

,

.

NO2

.

:

:

800–

,

:

1000

,

150–162.5ml/min,

.

,

40–70mm,

5–40mm

.

;

;

1.

,

C2H2

H

:

YG8YG16

[10,11]

:C2H2→C +C 2+C3+CH+CH2

60#240#400#600#

,

+CH 3+···;H2→2H;H(

–OH,O)+H → →C(dia)+H +H2;

1:3HNO3

5min,

+H2(

H2O–OH);*+–CH 3→C(dia)+3H ;

*+–CH 3

*+C(H

C2)→C(gra);

C(gra)+4H →CH4;C(gra)+–OH→CO+H C(gra)+O→ +CO.

H

,.

;C(dia)

,C(gra)

,

CH xC3

C 2

C (*

);

H

.

XL–30FE

1CFD

(EDAX)

Fig.1Schematicdiagramof ame-depositedcarbon

material

1

,

Y–4Q;

X–ray

T6400

Table1Numberofsampleanditstreatmentprocess

SampleNo

Blademodel

time

1#2#3#4#

YG8YG8YG8YG16

5min15min20min20min

1111

Coremoval

R(C2H2/O2)

time

60min60min60min70minDeposition

666

22

,

514.5nm,

1000–1800cm 1.

SOLVER

(

)

.

2

2.1

X

Y–4Q

X–ray

YG8

X

(2–5).,1#

5min

YG8

Co

;

,

,

XRD

(

(111)

)

18.49nm,

.2#

3#

15min20min

YG8

Co

,

60min

,2#

:WC

(CNT)

Co;3#

:WC

Co.4#

21#

XRD

Fig.2XRDpatternsofcarboncoatingonto1#sam-ple

surface

32#

XRD

Fig.3XRDpatternsofcarboncoatingonto2#sam-plesurface

:WC

(CNT)

Co.CuKα

,

;

,Co

CuKα

,

,

.

2.2

Raman1#

:

(1156cm 1)(1338cm 1)

(1584cm 1);

,

[11,12]

(

6).

2#

,

:

(CNT,G

1

1584cmD

1362cm 1

G1629cm 1)(1334cm 1),G ;

:

(CNT,G

1584cm 1 1D

1362cm 1G

1629cm),D

G

,G

,

)

43#

XRD

Fig.4XRDpatternsofcarboncoatingonto3#

sample

surface

54#

XRD

Fig.5XRDpatternsofcarboncoatingonto4#sam-plesurface

6

:

YG

667

61#

Raman

Fig.6Ramanspectroscopyofcarboncoatingonto

1#sample

surface

72#

Raman

Fig.7Ramanspectroscopiesofcarboncoatingonto

2#sample

surface

8

3#

Raman

Fig.8Ramanspectroscopyofcarboncoatingonto3

#samplesurface

1(1362cm 1494cm 11559cm 1),

[13]

(

8).4#

:

(CNT,G

1584cm 1D

1362cm 1G

1626cm 1),G

;

:

1(CNT,G

11584cm D

1362cmG

cm 1),

1626D

G

,G

94#

Raman

Fig.9Ramanspectroscopiesofcarboncoatingonto

4#samplesurface

,

[14,15]

(

9).

2.3SEM

,1#

,

.

CVD

,

[16,17]

,

(

10);2#4#

,

,

;

X

(EDS)

,

11,

C,

CoW(

13).4#

(AFM)(3–D)

(

14).

,

YG16

,

,

;

,

;3#

,

;

,

(

12).

2.4

,

60–80N,;

,

.1#

10μm,

12μm,

WC

,

,

μm(

15);2#

25μm,

14μm,

WC

,

,μm(

16);3#

,

50μm,

WC

668

22

101#

SEM

Fig.10Surfacemorphologiesofcarboncoatingonto1#samplesurface(a)Lowtimesphotograph;(b)

hightimes

photograph

112#

SEM

Fig.11Surfacemorphologiesofcarboncoatingonto2#samplesurface(a)Lowtimesphotograph;(b)

hightimes

photograph

123#

SEM

Fig.12Surfacemorphologiesofcarboncoatingonto3#samplesurface(a)Lowtimesphotograph;(b)

hightimes

photograph

134#

SEM

Fig.13Surfacemorphologiesofcarboncoatingonto4#samplesurface(a)Lowtimesphotograph;(b)

hightimesphotograph

6

:

YG

669

144#

AFM

:

Fig.14AFMmorphologiesofcarboncoatingonto4#samplesurface:Blackperipheryregion(a)Low

timesphotograph,(b)hightimesphotograph;innergreywhiteregion(c)Lowtimesphotograph,(d)hightimes

photograph

151#

Fig.15Crosssectionalmicrostructuresofcarboncoatingonto1#samplesurface(a)Lowtimesphoto-graph;(b)hightimesphotograph

,

,

(

(111)(

.

20μm,

)

18.49nm,

6)

,

(1156cm 1)

(

17);4#

70μm,

.

,

Co

10μm,

WC

,

YG3YG6

,

(

18).

YG8

(

).

2.5

YG8

1#

(

6

1584cm 1).

,

60min

,

XRD

2#

4#

670

22

162#

Fig.16Crosssectionalmicrostructuresofcarboncoatingonto2#samplesurface(a)Lowtimesphoto-graph;(b)hightimes

photograph

173#

SEM

Fig.17Crosssectionalmicrostructuresofcarboncoatingonto3#samplesurface(a)Lowtimesphoto-graph;(b)hightimes

photograph

184#

Fig.18Crosssectionalmicrostructuresofcarboncoatingonto4#samplesurface(a)Lowtimesphoto-graph;(b)hightimesphotograph

15min20min

,

R(C2H2/O2)=1

24.56nm,

5cm

60min70min

13.24nm.

YG16

,

)

70min

,

,

.

,

,

.

YG8

(2#

.

)

60min

,

XRD

(CNT(002),

(111)

)

.

,

.XRD

(4#

,

,

6

:

YG

671

nm,24.7220.13nm.

Co

,

(

)

.

Co

YG16,

,

,

.

,

1626cm 1

;

,

1

1360cm

(D

YG8).YG16

,

,

.

3#20min

YG8

,

60min

,

,

1#2#4#

,

.

,

XRD

,

3

spsp2

.

3

YG

,

,

60–80N,

.

YG8

,

,

18.49nm

,

;

YG8

(

24.56nm)

(

13.24nm)

;

YG8

,

20μm,

,

;

20min

YG16,

:

,

24.72nm

20.13nm,.

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