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International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014
DOI : 10.5121/ijcsea.2014.4304 41
ISOTROPY OF INTERMETALLIC
COMPOUNDS
Assoc. Prof. Dr. Fae`q A. A. Radwan
Faculty of Engineering - Near East University
KKTC – Lefkosa: P.O. Box: 670
Mersin 10 , Turkey
ABSTRACT:
The norm of elastic constant tensor and the norms of the irreducible parts of the elastic constants of
Intermetallic compounds are calculated. The relation of the scalar parts norm and the other parts norms
and the anisotropy of these compounds are presented. The norm ratios are used to study anisotropy of
these compounds.
Index Terms –Intermetallic Compounds Isotropy, Norm, Anisotropy, and Elastic Constants.
1. INTRODUCTION
The decomposition procedure and the decomposition of elastic constant tensor is given in
[1,2,3,4,5,6] , also the definition of norm concept and the norm ratios and the relationship
between the anisotropy and the norm ratios are given in [3,4,5,6]. As the ratio becomes close to
one the material becomes more isotropic, and as the ratio becomes close to one the material
becomes more anisotropic as explained in [3,4,5,6] .
2. CALCULATİONS
Table 1, Elastic Constants (GPa), [7]
Cubic System, Intermetallic Compounds 11c 44c 12c
CaAl2 97.0 36.6 22.4
CoPt 290 124 178
Cu3Au 191 66.3 138
CuAuZn2 136 52.9 130
GdAl2 160.5 59.5 36.8
International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014
42
AuGa2 100.2 29.9 73.4
AuZn (50 at % Zn) 141.8 54.5 126.3
AuZn (47 at % Zn) 138 52 126
HfCO2 256 90.3 123
LaAl2 143.7 43.0 32.0
LiIn 55.9 26.7 41.7
MgCu2 123 41.2 70.6
Mg2Pb 71.7 30.9 22.1
Mg2Sn 82.4 36.6 20.8
NdAl2 141 42.8 47.0
Nb3Sn 254 39.6 112
NiAl 212 112 143
Ni3Al 169 121 89
Ni3Fe (73.8 at %Ni) 230 119 114
PrAl2 138 45.2 41.8
AgMg 83.8 47.6 56.4
TbAl2 144 68 33
UCd11 100.7 32.8 35.8
UCO2 219 65.4 127
YAl2 170.8 56.2 34.0
YZn 94.4 47.3 46.0
ZrCO2 233 83.7 113
International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014
43
Table 2, the norms and norm ratios
By using table 1, and the decomposition of the elastic constant tensor [1,2,3,4,5,6], we have
calculated the norms and the norm ratios as is shown in table 2.
Cubic System,
Intermetallic
Compounds
sN dN nN N
N
Ns
N
Nd
N
Nn
UCd11 203.521 0 0.6416 203.522 1.0000 0 0.0032
CaAl2 187.266 0 1.2831 187.271 1.0000 0 0.0069
GdAl2 308.198 0 4.3076 308.228 0.9999 0 0.0140
PrAl2 269.719 0 5.3158 269.771 0.9998 0 0.0197
NdAl2 277.467 0 7.6987 277.574 0.9996 0 0.0277
Mg2Sn 168.233 0 10.632 168.568 0.9980 0 0.0631
UCO2 510.172 0 35.561 511.409 0.9976 0 0.0695
YAl2 313.152 0 22.363 313.949 0.9975 0 0.0712
Mg2Pb 149.474 0 11.181 149.892 0.9972 0 0.0746
HfCO2 569.207 0 43.993 570.905 0.9970 0 0.0771
TbAl2 296.241 0 22.913 297.126 0.9970 0 0.0771
ZrCO2 520.841 0 43.443 522.65 0.9965 0 0.0831
LaAl2 261.976 0 23.554 263.033 0.9960 0 0.0895
MgCu2 288.844 0 27.495 290.150 0.9955 0 0.0948
Nb3Sn 508.342 0 57.557 511.590 0.9937 0 0.1125
AuGa2 258.806 0 30.245 260.568 0.9932 0 0.1161
Cu3Au 495.993 0 72.955 501.329 0.9894 0 0.1455
CoPt 721.380 0 124.650 732.069 0.9854 0 0.1703
YZn 225.120 0 42.343 229.068 0.9828 0 0.1848
Ni3Fe (73.8 at 555.162 0 111.810 566.310 0.9803 0 0.1974
International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014
44
%Ni)
AuZn (47 at %
Zn) 405.609 0 84.319 414.28 0.9791 0 0.2035
AuZn (50 at %
Zn) 411.885 0 85.694 420.705 0.9790 0 0.2037
CuAuZn2 410.794 0 91.468 420.854 0.9761 0 0.2173
LiIn 152.700 0 35.927 156.869 0.9734 0 0.2290
AgMg 226.710 0 62.140 235.072 0.9644 0 0.2643
NiAl 559.666 0 170.470 585.053 0.9566 0 0.2914
Ni3Al 454.707 0 148.480 478.334 0.9506 0 0.3104
3. CONCLUSION
By examining the results which are given in table 2, we can conclude by considering the ratio
that the compound UCd11 is the most isotropic compound (because the value of in the case of
UCd11 is more small than that in the case of CaAl2), and the most anisotropic Intermetallic
compound is Ni3Al because the value of is the smallest and value of is the largest for Ni3Al,
and also we can notice that in the case of the Intermetallic compounds (CaAl2, GdAl2, PrAl2,
NdAl2, YAl2, TbAl2, and LaAl2) which every one of them contain two atoms of Aluminium,
Al, the most isotropic compound is CaAl2 and LaAl2 is the most anisotropic compound, and also
we can notice that in case of the compounds, AuZn (47 at % Zn), and AuZn (50 at % Zn), the
former one with less % Zn is more isotropic, and also we can notice that the Intermetallic
compound UCO2 is the most isotropic compound of the compounds (UCO2, HfCO2, and
ZrCO2) where ZrCO2 is the most anisotropic compound, also we can notice by considering the
value of we found that this value is the highest (721.380) in the case of the Intermetallic
compound CoPt so we can say that the Intermetallic compound CoPt elastically is the strongest,
and the in the case of Mg2Pb (149.474) the value of is the smallest so we can say that the
Intermetallic compound Mg2Pb elastically is the least strong compound.
International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014
45
REFERENCES
[1] Jerphagnon, J., Chemla, D. S., and Bonnevile, R., (1978), "The Description of Condensed Matter
Using Irreducible Tensors", Adv. Phys, 11, p1003-1017.
[2] Radwan, Fae'q A. A. (1999), " Norm Ratios and Anisotropy Degree", The First International
Conference in Mathematical Sciences, Applied Mathematics, ICM99, November 1999, United Arab
Emirates University, Al Ain, United Arab Emirates. Pak. J. Appl. Sci..Vol. 1, (3): 301-304, 2001.
[3] F. A. A. Radwan, 'Scalar Irreducible Parts of Sixth Rank Tensor', Arab Gulf Journal of Scientific
Research, 19 (3), Pp163-166, (2001).
[4] Fae`q A. A. Radwan, ' Some Properties of Copper - Gold and Silver - Gold Alloys at Different % of
Gold', Journal: Lecture Notes in Engineering and Computer Science Year: 2011, Vol 2189, Issue: 1,
pp1221-1224.
[5] Fae`q A. A. Radwan, ' Isotropy of Some Types of Bones`, International Journal of Engineering
Science and Technology (IJEST), Vol. 3 No. 4 April 2011: 3382-3386.
[6] Fae’q A. A. Radwan, ‘Some properties of copper-nickel at different % of Ni’, Pelagia Research
Library, Der Chemica Sinica, 2014, 5(1):34-38.
[7] Landolt-Börnstein, Group III, "Crystal and Solid State Physics", Volume, 11, Springer-Verlag.

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Isotropy of intermetallic compounds

  • 1. International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014 DOI : 10.5121/ijcsea.2014.4304 41 ISOTROPY OF INTERMETALLIC COMPOUNDS Assoc. Prof. Dr. Fae`q A. A. Radwan Faculty of Engineering - Near East University KKTC – Lefkosa: P.O. Box: 670 Mersin 10 , Turkey ABSTRACT: The norm of elastic constant tensor and the norms of the irreducible parts of the elastic constants of Intermetallic compounds are calculated. The relation of the scalar parts norm and the other parts norms and the anisotropy of these compounds are presented. The norm ratios are used to study anisotropy of these compounds. Index Terms –Intermetallic Compounds Isotropy, Norm, Anisotropy, and Elastic Constants. 1. INTRODUCTION The decomposition procedure and the decomposition of elastic constant tensor is given in [1,2,3,4,5,6] , also the definition of norm concept and the norm ratios and the relationship between the anisotropy and the norm ratios are given in [3,4,5,6]. As the ratio becomes close to one the material becomes more isotropic, and as the ratio becomes close to one the material becomes more anisotropic as explained in [3,4,5,6] . 2. CALCULATİONS Table 1, Elastic Constants (GPa), [7] Cubic System, Intermetallic Compounds 11c 44c 12c CaAl2 97.0 36.6 22.4 CoPt 290 124 178 Cu3Au 191 66.3 138 CuAuZn2 136 52.9 130 GdAl2 160.5 59.5 36.8
  • 2. International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014 42 AuGa2 100.2 29.9 73.4 AuZn (50 at % Zn) 141.8 54.5 126.3 AuZn (47 at % Zn) 138 52 126 HfCO2 256 90.3 123 LaAl2 143.7 43.0 32.0 LiIn 55.9 26.7 41.7 MgCu2 123 41.2 70.6 Mg2Pb 71.7 30.9 22.1 Mg2Sn 82.4 36.6 20.8 NdAl2 141 42.8 47.0 Nb3Sn 254 39.6 112 NiAl 212 112 143 Ni3Al 169 121 89 Ni3Fe (73.8 at %Ni) 230 119 114 PrAl2 138 45.2 41.8 AgMg 83.8 47.6 56.4 TbAl2 144 68 33 UCd11 100.7 32.8 35.8 UCO2 219 65.4 127 YAl2 170.8 56.2 34.0 YZn 94.4 47.3 46.0 ZrCO2 233 83.7 113
  • 3. International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014 43 Table 2, the norms and norm ratios By using table 1, and the decomposition of the elastic constant tensor [1,2,3,4,5,6], we have calculated the norms and the norm ratios as is shown in table 2. Cubic System, Intermetallic Compounds sN dN nN N N Ns N Nd N Nn UCd11 203.521 0 0.6416 203.522 1.0000 0 0.0032 CaAl2 187.266 0 1.2831 187.271 1.0000 0 0.0069 GdAl2 308.198 0 4.3076 308.228 0.9999 0 0.0140 PrAl2 269.719 0 5.3158 269.771 0.9998 0 0.0197 NdAl2 277.467 0 7.6987 277.574 0.9996 0 0.0277 Mg2Sn 168.233 0 10.632 168.568 0.9980 0 0.0631 UCO2 510.172 0 35.561 511.409 0.9976 0 0.0695 YAl2 313.152 0 22.363 313.949 0.9975 0 0.0712 Mg2Pb 149.474 0 11.181 149.892 0.9972 0 0.0746 HfCO2 569.207 0 43.993 570.905 0.9970 0 0.0771 TbAl2 296.241 0 22.913 297.126 0.9970 0 0.0771 ZrCO2 520.841 0 43.443 522.65 0.9965 0 0.0831 LaAl2 261.976 0 23.554 263.033 0.9960 0 0.0895 MgCu2 288.844 0 27.495 290.150 0.9955 0 0.0948 Nb3Sn 508.342 0 57.557 511.590 0.9937 0 0.1125 AuGa2 258.806 0 30.245 260.568 0.9932 0 0.1161 Cu3Au 495.993 0 72.955 501.329 0.9894 0 0.1455 CoPt 721.380 0 124.650 732.069 0.9854 0 0.1703 YZn 225.120 0 42.343 229.068 0.9828 0 0.1848 Ni3Fe (73.8 at 555.162 0 111.810 566.310 0.9803 0 0.1974
  • 4. International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014 44 %Ni) AuZn (47 at % Zn) 405.609 0 84.319 414.28 0.9791 0 0.2035 AuZn (50 at % Zn) 411.885 0 85.694 420.705 0.9790 0 0.2037 CuAuZn2 410.794 0 91.468 420.854 0.9761 0 0.2173 LiIn 152.700 0 35.927 156.869 0.9734 0 0.2290 AgMg 226.710 0 62.140 235.072 0.9644 0 0.2643 NiAl 559.666 0 170.470 585.053 0.9566 0 0.2914 Ni3Al 454.707 0 148.480 478.334 0.9506 0 0.3104 3. CONCLUSION By examining the results which are given in table 2, we can conclude by considering the ratio that the compound UCd11 is the most isotropic compound (because the value of in the case of UCd11 is more small than that in the case of CaAl2), and the most anisotropic Intermetallic compound is Ni3Al because the value of is the smallest and value of is the largest for Ni3Al, and also we can notice that in the case of the Intermetallic compounds (CaAl2, GdAl2, PrAl2, NdAl2, YAl2, TbAl2, and LaAl2) which every one of them contain two atoms of Aluminium, Al, the most isotropic compound is CaAl2 and LaAl2 is the most anisotropic compound, and also we can notice that in case of the compounds, AuZn (47 at % Zn), and AuZn (50 at % Zn), the former one with less % Zn is more isotropic, and also we can notice that the Intermetallic compound UCO2 is the most isotropic compound of the compounds (UCO2, HfCO2, and ZrCO2) where ZrCO2 is the most anisotropic compound, also we can notice by considering the value of we found that this value is the highest (721.380) in the case of the Intermetallic compound CoPt so we can say that the Intermetallic compound CoPt elastically is the strongest, and the in the case of Mg2Pb (149.474) the value of is the smallest so we can say that the Intermetallic compound Mg2Pb elastically is the least strong compound.
  • 5. International Journal of Computer Science, Engineering and Applications (IJCSEA) Vol.4, No.3, June 2014 45 REFERENCES [1] Jerphagnon, J., Chemla, D. S., and Bonnevile, R., (1978), "The Description of Condensed Matter Using Irreducible Tensors", Adv. Phys, 11, p1003-1017. [2] Radwan, Fae'q A. A. (1999), " Norm Ratios and Anisotropy Degree", The First International Conference in Mathematical Sciences, Applied Mathematics, ICM99, November 1999, United Arab Emirates University, Al Ain, United Arab Emirates. Pak. J. Appl. Sci..Vol. 1, (3): 301-304, 2001. [3] F. A. A. Radwan, 'Scalar Irreducible Parts of Sixth Rank Tensor', Arab Gulf Journal of Scientific Research, 19 (3), Pp163-166, (2001). [4] Fae`q A. A. Radwan, ' Some Properties of Copper - Gold and Silver - Gold Alloys at Different % of Gold', Journal: Lecture Notes in Engineering and Computer Science Year: 2011, Vol 2189, Issue: 1, pp1221-1224. [5] Fae`q A. A. Radwan, ' Isotropy of Some Types of Bones`, International Journal of Engineering Science and Technology (IJEST), Vol. 3 No. 4 April 2011: 3382-3386. [6] Fae’q A. A. Radwan, ‘Some properties of copper-nickel at different % of Ni’, Pelagia Research Library, Der Chemica Sinica, 2014, 5(1):34-38. [7] Landolt-Börnstein, Group III, "Crystal and Solid State Physics", Volume, 11, Springer-Verlag.