IBN AL- HAITHAM J. FOR PURE & APPL. SCI VOL.22 (2) 2009

Measurement of Acoustic Impedance for Ultrasonic Waves in Ceramic Composite

A. W. Watan Department of Physics, College of Education Ibn al – Haitham, University of Baghdad

Abstract Ceramic specimens containing 30% kaoline and 70% burnt clay containing 25% water were ,prepared by standard cas ting .Their properties (density ,apparent porosity, and apparent water absorption) were determined. Ultrasonic test method as nondestructive method were used to determine acous tic impedance (Z) by Puls velocity measurements . A close relation is explicitly that is found and which is related its sintering behaviour.

2009) 2( 22ابن الھیثم للعلوم الصرفة والتطبیقیة المجلد مجلة

30%

7025

Z

1

2

Pulse method

Nondestructive test

NDT3

4,Nhuapeng20025

PZT(lead zirconium titanete)

Zhiqulu20046

2009) 2( 22الھیثم للعلوم الصرفة والتطبیقیة المجلد مجلة ابن

Hertz

Hz200010Hz

2000Ultrasonic

7

8

91

7

1[Z= ρv

ρv

30

70

10

1000،250,90

25cm5550C800،900،1050

(11)

11

2009) 2( 22مجلة ابن الھیثم للعلوم الصرفة والتطبیقیة المجلد

Bulk density( ρB ) = wiws

Wd

. D [2]

Apparent porosi ty %( A.p) = wiws

wdws

* 100 [ 3]

Water Absorption %( w.A) = wd

wdws * 100 [4]

Dgm/cm3WigmWd

gmWs gm

OYO- Sonic Viewer Model -

5217A

transmitter transducerreceiver transducer

2

3

- -Vp66

tpL

12

[5] Vp=L/tp

- - Vs33

tsL

12

[6] Vs=L/ts

1P-Wave

37،54,82,150 vpZ

2009) 2( 22علوم الصرفة والتطبیقیة المجلدمجلة ابن الھیثم لل

11

34

)12

5

firingGrainPores

13

14

6

15

ρV

7

VpVs

1678

Zf9

refractionreflection

17

1

2

2009) 2( 22مجلة ابن الھیثم للعلوم الصرفة والتطبیقیة المجلد

3vpvs

4fZ

1.Van Vlak,L.H,(1997),Elements of materials science and engineering ', third Edition,Addison Wesley Publishing company. 2. R.D.Adams & P.Cawley ,(1988 FromI,"NDT International" 21(4),Augus t. 3.Barry Hull&Vernon John,(1988)"Non-Destructive Testing"Macmillan Education LTD. 4.R.Halmshaw .(1988),Introduction to the NDT of welded Joints , the welding Institute cambrihge-UK,p.48-75. 5.Wim Nhuapeng,Jerapong Tautrakoon and Tawee Tuakasri,(2002) CMU.Journal, 1(1):61. 6.Zhiqu Lu,Craigj.Hickey,and James M.Sabatier(2004),Soil Soc.AM.J,vol.68,January- February. 7.R.Halmshaw .(1987),Non-Destrustive Testing"Routledgc, champman and Hall,Inc. 8.J. Krauthramer& H.Krauthramer,(1969),"Ultrasonic Testing of Materials", springer- verlag,Berlin,Heidelberg. 9.Peter A.Payne ,(1994), New and Advanced Materials Technology Monitor "Issue No.35\1. 10.W.D.Kingery,(1975),"Introduction to ceramics", second edition, by Awiley Interscience Publication. 11.M.W.Barsun(1997),Fundamentals of ceramics"Mc Graw –Hill Companies,INC 12.R.N.Thurston &Allan D.Pierce ,(1990), Vol.XIX,Academic Precc,INC 13.Malcolm J.Crocker ,(1998), Hand Book of Acoustics, John wiley &Sons, INC 14.Auregan, Y.and Pachebat,M,(1999),Measurement of the nonlinear behavior of acous tical rigid porous materials, Physics of Fluid, 11(6):1342-1345. 15.Wonsiri Punurai,Jacek Jarzynski,(2006),Characterization of entrained air voids in cement Paste with scattered ultrasound,NDT&E International. 16.L.P.Martin,J.c.Poret,A.Danon,M.Rosen,(1998), Materials Science and Engineering A252:27-35. 17.George Y.Baaklini,Edward R.Generazio,and James D.Kiser,(1989), J.Am.Ceram.Soc,72(3):383-387

2009) 2( 22مجلة ابن الھیثم للعلوم الصرفة والتطبیقیة المجلد

19 2

3

الصوتیة ة والاعاقة مسامی 5) یوضح العلاقة بین ال ل( شك

0

5

10

15

20

25

30

35

40

45

27.084 30.903 31.108

Apparent Porosity%

Ac

ou

stic

e

Imp

ed

anc

e(K

g/m

2.s

ec

)×1

05

2009) 2( 22فة والتطبیقیة المجلدمجلة ابن الھیثم للعلوم الصر

لاعاقة الصوتیة لتلبید وا لعلاقة بین درجات حرارة ا ح ا الشكل ( 3) یوض

0

5

10

15

20

25

30

35

40

45

700 800 900 1000 1100

Sinter in g T empe rature (C0)

Ac

ou

sti

c

Imp

ed

an

ce

(Kg

m/m

2.s

ec

)×10

5

ة ل(4) یوضح تاثیر الكثافة الحجمیة على الاعاقة الصوتی شك

15

20

25

30

35

40

45

1.65 1.7 1.75 1.8

Bulk dencity(gm/cm3)

Ac

ousti

ce ◌ِ

◌ِ◌ِ

Imp

ed

an

ce(K

gm

/m2.s

ec

لاعاقة الصوتیة شكل(9)یوضح تاثیر تردد الموجات فوق الصوتیة على ا

30

32

34

36

38

40

42

44

46

37 54 66 82 150

Frequency (KHz)

Aco

ustic

e

impe

danc

e(K

gm/m

2 .se

c) ×

105

قة الصوتیة لاعا ة القصیة وا شكل( 8) یوضح العلاقة بین سرعة الموج

15

20

25

30

35

40

45

700 1200 1700

Shear ve locity(m/sec)

Aco

ustic

Imp

ed

an

ce(K

g/m

2.s

ec)×

10

5

شكل (7) یوضح العلاقة بین سرعة الموجة والاعاقة الصوتیة

15

20

25

30

35

40

45

1250 1750 2250 2750

Longitudial Pules velocity(m/sec)

Ac

ous

tic

Im

pe

da

nc

e

(Kg

/m2.s

ec

)×1

05

ش�كل (6) یوض�ح العلاق�ة بی�ن الامتصاص�یة الظاھری�ة للم��اء م��ع الاعاق��ة الص��وتیة

0

10

20

30

40

50

15.219 18.334 18.362

Water Absorption %

Aco

ust

ic Im

ped

ance

(Kg/

m2.s

ec) ×

105