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ˆ˛˚ ˝ TiB 2-TiC ˙˝ ˆ ˘ˇ ˆ ˝˜˜ !ˇ ˆ # $ %˜ & ’(...

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/ 5 / 1 / 1393 15 TiB 2 -TiC ! "# $ % & ’( * 1 2 )(*+ TiB 2 -TiC !"" # $$% & ’( ) *+ *, MACS ) Microwave-Assisted Combustion Synthesis ( $/ $0 . 234 $ 3Ti + B 4 C #) 5)6 7, 8 0 9 $/ 5)6 :+) . ;<" :% #$/ 5)6 MACS =’ >’ mm 10 *0 @"A #@) 7 80 W 1100 :% B) ) $/ # . C" /" "6 XRD SEM *D" )6 * 8 234 0 8 9 ) E:+) TiC TiB 2 :F * $/ #, 0 # G"% 8 " HIJ " KG0 L $F 0 $) A . # I0 MN)N O( $/ $P0 " G+ "N . L Q E )6 R* 234 1 8 :+) 9 E:+) 8"," ) :% ;S * K$ 3 8 8F’ 35 : 8"V . : E;"W0 $W E:WX"" #W) 5W)6 W $W E E W’( W) :WJ0 . 1 - Z" #@D 7) )$ $/ [/ 8," #$ND E\ 2 - $] )$ #$ND" ) *0 G ] #@D" Z * * - 8F H^! #$!" : [email protected]
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Page 1: ˆ˛˚ ˝ TiB 2-TiC ˙˝ ˆ ˘ˇ ˆ ˝˜˜ !ˇ ˆ # $ %˜ & ’( ˛˝ˇjournals.miau.ac.ir/article_487_802bffc72cffa8c5491f8d5b96c7d183.… · ˇ tic tib 2 ‘ 0 * ,˙ ) ˘ "˚0 ˚a

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"�," ��8 :!4" ) 8"�," ��W�3 � 6 #$W/ 5��W)6 :+�W) )aEb(( "�," E8 9 #$W/ 5��W)6 :+�W) )c( �� A�W)��� �� E

*6 �� 8WW� :WW)� �����WWA� � A��WW�N� m� G!WW" � OWW434 � 8"�� 8W ���W�� 8�DW0 ����Wy ONW/ � #��$W"� �Wc" �� �W� 7� $"��� �@��]11[ . ��� �� �W� 8W"�� ��� �]~�� 5�d �%

��/ �� #$�� ��A 8 . ��� 8"�� � #��$W"� L� m� G!" � ��� :4�� L� ��� �� 8� :)� �� #$�$� 8W �W% ��W/�� OW�'

:)� ��4D0. ON/ 6 ���I0 TEM �W �� 8"�," 8 2��� 9 :+�W)

"�," ��� *���+ 8 8� �� �N�"�N� 5��)68 #$W/ � �W) $W/ 8 A��/ �� 8"�," ���,0 �� ��) C��W " 8W 8W%�0 �W

�/�" �� XRD � SEM(D" E$�� �� *� . *�,� 8� 8"�b#$��D� H�IWJ� ������ K��d E��/ �� ) O��/2TiB�TiC ( � :A���N� � G!" :4�� � ��]� �����

��DWW�) ��$WW(nm40 �WW�� nm60($� !WW� E .ONWW/ �]~�� 5�d �� *�D" 8� :)� ���� m���,+ EK��d ����y

7� � H�I0� ��� OJ� �� �� 8"�� �J>) ����� �@��. ON/ ��W�7 � 8 �� OW��( ����IW0 `W�0�0 8W TEM ) O��WW/)Dark Field ( �)Bright Field (( 8WW 2�WW��

K$W� 8 8� ���� 8"�,"6 � 9 � #$W/ ������W)6 :+�W) qX)���� 8 ��b���' �������� �'�� (� � �) *�DW" �� $"�

��$���. �� ��"�W" K��d ����I0 ��� �� TiB2 ��,W~ *�W�� �� 8

TiC *�D" $"� #$/ ���)��/ � ��� ) K��d ��� ��f( �� �� ���IW0 *��� ���W' �Wc" $W� � *��0 7W���0 8W���� $W� ��

)field Dark (��� ��4DWW0 . ����IWW0 mS�WW�� 8WW� ��WWQ field Dark �� ���W� 7W�NB0 ���W ���W�G� $W"��0 �� 8"���)$/� 8"�b$�Q ���(]10[.

ON/ �� 9 &��W� ��W@�� ���I0 8 8%�0 � ESEDP1 �W�

*�WW,�)Selected Area Diffraction Pattern ( K�JBW� E�y�� �)100 ( �)101 ( ��W� 8W 2�W��TiB2 �

K�JBWW�)111 ( E)200 ( �)220 ( 8WW 2�WW��TiC) �WW 8{��� K�G)�J� �� #��B )� ( "�," ���8 �� �) 9 :+�) $"$/ ���)��/ E#$/ 5��)6 .$�$�# ����W�� �� 8� ��@��

�����W)6 *��� ;�W<"� ��W( �� LW� *6 ����W� 2�W34� � :W% ;�S *�W�� K$� ����E$/ #$��D� �����6 �3,+

�� �������� #�@ )� *��� �� �'�� (� ����� O�,N0 . 8W

1 -Second Electron Defraction Pattern

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8"�b�� �� ����W� 2�W34� ������)6 *��� ������ � 8�1 8 :+�)9 �� 8"�," � �) :% ;�S *��� K$� E:+�) 3

8F�'���� 8 35�� 8�"�V :��� ��.

&4���'��5 ����TiB2-TiC � �W) &�� 8 ��� !����"�" �W'�� (�

�WWWWW������� MACS)Microwave-Assisted

Combustion Synthesis ($/ � �) . R����W� 2�34� O��/ 8���� 3Ti + B4C #���W) 5��W)6 7W,� 8 �W0 ��9

$/ 5��)6 :+�) . ��W����� �� 8W���� �� #$W�6 :W)$ �� *��� ���b*�b�"� ����� ;�<"� :% E������)6 MACS E

=�' $W/ � �W) �������W� #�@ W)� 7,� 8 � 8�0 ���� . C�� "�/�" ��W�����"6 �� XRD � SEM �W 8W� ��� *�DW"

�����)6 *��� ������� 2�34� �W0 E8���� 9 � �W) E:+�W) ��� �Wc" ���W� ���)TiC � TiB2 ( ��W :W�F��� �W ��W0

*���� � #$/ #��,��������� #� �"�W�� K�WG���0 � �G"�% 8 ���" H�IJ� ��L� ��$F� ���0 :)� #$�)� ��A . �W��

$W/ $W��P0 ��" ���G+ �"�� N�� M�N)��N�� ���I0 � ��� .L����QE 2�W34� 5��W)6 *�W�� ����W�� � �� ����W� 1

8 :+�)9 �� 8"�," � �) :% ;�S *��� K$� E:+�) 3 8F�'���� 8 35 ���� 8�"�V :���.

Refrences 1- C. Suryanarayana, "Mechanical Alloying

and Milling", Prog. Mater Sci., vol. 46, pp. 1–

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K�WWWG���0 ���WWWb ��WWW�� �WWW)��xMnO2 + (1-

x)YBa2Cu3O7-δ " �W)��/ �"�� � �)��/��3 83<� E #��,/ E*����2 = E219- 226 E1390.

10- B. D. Cullity, "Elements of X-Ray

Diffraction", Second Edit, Addison-

Wesley Publishing, 1977.

11- J. W. Kim, S. H. Lee, K. H. Oh, J. H.

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210, 2007.

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TiC Composites Formed by Field

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��$F� O4340 � \�%�+� ����� 8 &�� � �W) �W'�� (� � *�$ H�,+� ��D�"83<� E ���� "E��� $3%3 #��,/ E2 = E

1- 12E *� !�� 1391.

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"In Situ Processing of TiB2/TiC Ceramic

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20

15- I. Gotman, N. A. Travitzky, and E. Y.

Gutmanas, "Dense in Situ TiB2–TiN and

TiB2 -TiC Ceramic Matrix Composites:

Reactive Synthesis and Properties", Mater.

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Propagating Exothermic Reactions: the

Synthesis of High Temperature Materials

by Combustion", Mater. Sci. Rep., vol. 3,

pp. 277–365, 1989.

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Temperature Synthesis of Ceramic

Materials", Ph.D. Dissertation, University

of New York, Buffalo, NY, 1988.

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Synthesis of Advanced Material, Part I.

Reaction parameters", Progress in

Moterids Science, vol. 39, pp. 237-248,

1995.

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Temperature Synthesis", University of

Calfornia, Lawrence Livermore National

Laboratory.

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"TiB2/TiC Nano Composite Powder

Fabricated Via High Energy Ball Milling",

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2001.

�����0

67�1-����9/� XRD ������� :a ( � ;� '��$((As received) < b (1 < c (3 < d (6 � e (9� � '��$( =>�$

10 20 30 40 50 60 70 80

2θ (deg.)

Inte

nsi

ty (

a.u

)

Ti: B4C: TiB2: TiC:

(a)

(e)

(d)

(c)

(b)

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67�2 -����9/� XRD ������� :a ( � ;� '��$((As received) <b (1 <c (3 <d (6 � e (9 � � '��$( =>�$

����%��� �� � � �"?$ @A$ �

67�3- B�C� �� D?��� ��� �����%E 6�7;- ./��- � .$ ?� FG � H�-��� I%J )3Ti+B4C .(]14[

10 20 30 40 50 60 70 80

2θ (deg.)

Inte

nsi

ty (

a.u

)

TiB2: TiC:

(a)

(e)

(d)

(c)

(b)

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22

67�4-���� 6CC"� ��"#�$��� *� �%��N- �"?$ �& ����%��� ��"�(� �� � �6'��$( D�� O���> =>�$

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67�5- %���N- SEM�& .��� ���� =07� PQ$ *� :a (3 <b (6 � c (9 �� � � �"?$ � .7���7� '��$( =>�$

)�R���R .���?R��& �� �� ����%��� ��9"$�

100 µm

100 µm

100 µm

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24

67�6- %��N- TEM) Bright Field (?$ ���� �& ��"9'��$( =>�$

67�7- %��N- TEM) 6���)Dark Field( � )Bright Field(( �& ����%��� ��"�(� �� � � �"?$ ���� & B�&%� 6

'��$( O���> =>�$

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67�8- %��N- TEM) 6���)Dark Field ( �)Bright Field((� � �"?$ ���� & B�&%� �& ����%��� ��"�(� �� 9

'��$( O���> =>�$

67�9- %��N- TEM ��"?$ ���� 9 S�%� ��9/� ��%�� & � � '��$( =>�$ )SADP(S%T�?"�

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26


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