A series of YTi(Fe_(1-x)_(11)alloy with x=0.00,0.01,0.03,0.04,0.05,0.07 and 0.10 has been investigated by measurement of the structural properties and ^(57)Fe M(?)ssbauer experiments.The pure ThMn_(12)-structure phase...A series of YTi(Fe_(1-x)_(11)alloy with x=0.00,0.01,0.03,0.04,0.05,0.07 and 0.10 has been investigated by measurement of the structural properties and ^(57)Fe M(?)ssbauer experiments.The pure ThMn_(12)-structure phase exists at x≤0.03 and is absent at x>0.03.The reasons for lower satura- tion magnetization and lower energy product of the ThMn_(12)-structure compounds were given.The crystal structure relations between R_2Fe_(17)-structure and ThMn_(12)-structure were discussed.Comparing with the R_2Fe_(17)and R_2Fe_(14)B compounds,the ThMn_(12)-structure RFe_(12-x)M_x compounds have the same magnetic moment of Fe at x=0.The potential for increasing the saturation magnetization of ThMn_(12)-structure compounds may be enhanced by the addition of stabilization elements.展开更多
Methyl 12-bromo-13,14-furoxan-deisopropyldehydroabietate, C18H22BrN2O4, has been synthesized and characterized by IR,^1H NMR, ^13C NMR and single-crystal X-ray diffraction method. It crystallizes in orthorhombic, spac...Methyl 12-bromo-13,14-furoxan-deisopropyldehydroabietate, C18H22BrN2O4, has been synthesized and characterized by IR,^1H NMR, ^13C NMR and single-crystal X-ray diffraction method. It crystallizes in orthorhombic, space group P212121 with a = 6.652（2）, b = 12.832（4）, c = 20.483（6）°A, V = 1748.5（9） °A^3, Z = 4, Mr = 410.29, D, = 1.559 g/cm^3, λ= 0.71070°A, μ（MoKα） = 2.377 mm^-1, F（000） = 844, the final R = 0.0243 and wR = 0.0533 for 3780 observed reflections with I〉 2σ（I）. The C-H and bromine atom are involved in intermolecular hydrogen bonds which link the molecules into a one-dimensional chain.展开更多
Ni80Fe20/Ni48Fe12Cr40 bilayer films and Ni80Fe20 monolayer films were deposited at room temperature on SiO2/Si（100） substrates by electron beam evaporation. The influence of the thickness of the Ni48Fe12Cr40 underla...Ni80Fe20/Ni48Fe12Cr40 bilayer films and Ni80Fe20 monolayer films were deposited at room temperature on SiO2/Si（100） substrates by electron beam evaporation. The influence of the thickness of the Ni48Fe12Cr40 underlayer on the structure, magnetization, and magnetoresistance of the Ni80Fe20/Ni48Fe12Cr40 bilayer film was investigated. The thickness of the Ni48Fe12Cr40 layer varied from about 1 nm to 18 nm while the Ni80Fe20 layer thickness was fixed at 45 nm. For the as-deposited bilayer films the introducing of the Ni48Fe12Cr40 underlayer promotes both the （111） texture and grain growth in the Ni80Fe20 layer. The Ni48Fe12Cr40 underlayer has no significant influence on the magnetic moment of the Ni80Fe20/Ni48Fe12Cr40 bilayer film. However, the coercivity of the bilayer film changes with the thickness of the Ni48Fe12Cr40 undedayer. The optimum thickness of the Ni48Fe12Cr40 underlayer for improving the anisotropic magnetoresistance effect of the Ni80Fe20/Ni48Fe12Cr40 bilayer film is about 5 nm. With a decrease in temperature from 300 K to 81 K, the anisotropic magnetoresistance ratio of the Ni80Fe20 （45 nm）/Ni48Fe12Cr40 （5 nm） bilayer film increases linearly from 2.1% to 4.8% compared with that of the Ni80Fe20 monolayer film from 1.7% to 4.0%.展开更多
Geometries, energies, and vibrational frequencies for two C4N12O4 isomers with pagodane- and isopagodane-like structures have been calculated at the B3LYP/6-31G＊ level.Isomers 1 and 2 are of D2h and D2d symmetry, res...Geometries, energies, and vibrational frequencies for two C4N12O4 isomers with pagodane- and isopagodane-like structures have been calculated at the B3LYP/6-31G＊ level.Isomers 1 and 2 are of D2h and D2d symmetry, respectively. Heats of formation for the two C4N12O4 isomers have been estimated in this paper, indicating they would be reasonable candidates for high energy density materials.展开更多
A novel adenine(Ade) salt of 12-phosphotungstic acid was synthesized and characterized by elemental analyses,IR, 1H NMR,CV and single crystal X-ray diffraction. The compound crystallized in a triclinic system with...A novel adenine(Ade) salt of 12-phosphotungstic acid was synthesized and characterized by elemental analyses,IR, 1H NMR,CV and single crystal X-ray diffraction. The compound crystallized in a triclinic system with a space group P 1 and a =1.3108(3) nm, b =1.3515(3) nm,c =1.3870(3) nm, V =2.0217(7) nm 3,Z =1,R _1=0.0391,wR _2=0.0959. The structure unit of the complex was constructed from [HPW_ 12 ·O_ 40 ] -,(C_5H_6N_5) + and C_3H_7NO,which further extends to form a novel three-dimensional host-guest network via hydrogen-bonding interactions. The anti-tumor activity of the compound was examined in two human tumor cell lines in vitro .展开更多
The effect of substitution of Mn on the structure and magnetic properties of HoFe 12- x Mn x (x =2 0, 3 0, 4 0 and 5 0) compounds was investigated. All the HoFe 12x Mn x compounds studied cry...The effect of substitution of Mn on the structure and magnetic properties of HoFe 12- x Mn x (x =2 0, 3 0, 4 0 and 5 0) compounds was investigated. All the HoFe 12x Mn x compounds studied crystallize in ThMn 12 type of structure. The lattice constants and unit cell volume increase monotonously with increasing Mn concentration. The Curie temperature and the moments of the transition metal sublattice of HoFe 12- x Mn x compounds decrease monotonously with increasing Mn content. A minimum appears at x =3 0 in the Mn concentration dependence of the saturation magnetization of HoFe 12- x Mn x compounds. A compensation point appears in the M(t) curve of the compound with x =4 0. The mean field constant n RT of HoFe 9Mn 3 was calculated.展开更多
It was revealed that an average energy of special boundaries is proportional to APB energy in the alloys with the L12 superstructure. This fact proves the appearance of the GAPBs in the planes of location of special b...It was revealed that an average energy of special boundaries is proportional to APB energy in the alloys with the L12 superstructure. This fact proves the appearance of the GAPBs in the planes of location of special boundaries in coincidence sites of ordered alloys. It was determined that the more energy of special boundaries in ordered alloys, the more energy of complex stacking fault. There is a correlation between the distribution of special boundaries as a function its relative energy and ordering energy: the more ordering energy, the more degree of washed away of distribution. The correlation between average relative energy of special boundaries and ordering energy was detected: the more ordering energy, the more average energy of special boundaries. The reverse dependence between ordering energy and average number of special boundaries in grains limited by boundaries of general type was discovered.展开更多
The geometric structures, electronic properties, total and binding energies, harmonic frequencies, the highest occupied molecular orbital to the lowest unoccupied molecular orbital energy gaps, and the vertical ioniza...The geometric structures, electronic properties, total and binding energies, harmonic frequencies, the highest occupied molecular orbital to the lowest unoccupied molecular orbital energy gaps, and the vertical ionization potential energies of small LimBn （m＋ n = 12） clusters were investigated by the density functional theory B3LYP with a 6-31 I＋G （2d, 2p） basis set. All the calculations were performed using the Gaussian09 program. For the study of the LimBn clusters, the global minimum of the B 12 cluster was chosen as the starting point and the boron atoms were gradually replaced by Li atoms. The results showed that as the number of Li atoms increased, the stability of the LimBn cluster decreased and the physical and chemical properties became more active. In addition, on average there was a large charge transfer from the Li atoms to the B atoms.展开更多
10C12 is an anticoagulant antibody identified from a phage display single-chain Fv human antibody library. It can be directed at the calcium-stabilized Gla domain of Factor-IX, an important coagulation factor in intri...10C12 is an anticoagulant antibody identified from a phage display single-chain Fv human antibody library. It can be directed at the calcium-stabilized Gla domain of Factor-IX, an important coagulation factor in intrinsic pathway of blood coagulation cascade, and interfere with membrane anchoring of Factor IX, thus inhibiting blood coagulation function. 10C12 has been demonstrated as an effective anti-coagulant in attenuating thrombosis in several different animal models. Here, we report the crystal structure of the Fab fragment of 10C12. The crystal contains two Fab molecules in the asymmetric unit with identical conformation, forming a lattice with large cavities. In addition, comparison of this free Fab with the antigen-bound structure of 10C12 shows no change in CDR conformations and the relative disposition of the variable subunits of H and L chains, suggesting the rigid conformation of this 10C12 Fab and a lock-and-key mechanism of antibody-antigen recognition for 10C12.展开更多
Progesterone（1） was biotransformed into the title compound 12β,15α-dihydroxy-progesterone（2） with Colletotrichum lini AS3.4486.The biotransformation process was monitored with HPLC.The structure of 2 was determi...Progesterone（1） was biotransformed into the title compound 12β,15α-dihydroxy-progesterone（2） with Colletotrichum lini AS3.4486.The biotransformation process was monitored with HPLC.The structure of 2 was determined by 1H NMR,13C NMR,ESI-MS and single-crystal X-ray diffraction.The crystal of the compound belongs to orthorhombic,space group P212121 with a = 8.0671（9）,b = 12.3970（15）,c = 18.532（3） ,Z = 4,V = 1853.3（4）3,Dc = 1.242 mg/m3,μ = 0.084 mm-1,F（000） = 752,R = 0.0373 and wR = 0.0850.Single-crystal X-ray diffraction analysis reveals that a 1D supramolecular structure of 2 has been constructed by multiply intermolecular O（2）-H（2）…O（4） and O（3）-H（3）…O（2） H-bonding interactions.展开更多
The structure, chemical bonds and hydra-tion activity of C12A were studied by SCC-DV-Xa method of computational quantum chemistry. The calculated results show that Ca-O bond will be first broken off when C12A hydrates...The structure, chemical bonds and hydra-tion activity of C12A were studied by SCC-DV-Xa method of computational quantum chemistry. The calculated results show that Ca-O bond will be first broken off when C12A hydrates, the reactivity of Al(2)O4 tetrahedron is superior to that of Al(1)O4 tet, thedron and the rupture of the Al-O-Al chain composed of two types of AlO4 tetrahedra under the action of water lies in the very weak Al(2)-O(2) bonds. the Al-O bond strength of C12A7 is between C3A and C11A7·CaF2.展开更多
Abstract： We mainly studied effects of nucleation parameters （ △Tv,max and △Ts,max ） and superheat on solidification structure of ZG12MnMoV low-alloy steel by integration of CAFE and experimentation. The result s...Abstract： We mainly studied effects of nucleation parameters （ △Tv,max and △Ts,max ） and superheat on solidification structure of ZG12MnMoV low-alloy steel by integration of CAFE and experimentation. The result shows that grain dimension is not only related with nucleation parameters, but also with superheat. The smaller△Tv,max and △Ts,max get, the tinier grain turns. The lab experimentation on optimum parameter is conducted, the mean diameter of grain in lab test specimen is 153.2 lain, and the mean diameter calculated by CAFE model is 151.1 μm. The calculated solidification structure agrees with the experimental result in the main.展开更多
CFRP/2A12 laminated structure due to the large difference in the properties of the material,very easy to produce defects when making holes,affecting the quality of the workpiece,and thus the connection performance of ...CFRP/2A12 laminated structure due to the large difference in the properties of the material,very easy to produce defects when making holes,affecting the quality of the workpiece,and thus the connection performance of the two materials.The root cause of the poor quality of CFRP/2A12 laminated structure is the difference in material removal mechanism and the complexity of tool processing conditions.Therefore,this paper analyzes the effects of different process parameters on the pore-forming quality of the laminated material through experiments,reveals the change law of cutting force of the CFRP/2A12 laminated structure,and determines the optimal process parameters.The results show:The axial force generated by the drill when it enters half of CFRP is the largest,which is much larger than the axial force generated when drilling 2A12 aluminum alloy plate,and the thickness of the laminated metal plate is great for drilling.The hole formation sequence of the laminated structure has a significant effect on the cutting force.The axial force when the laminated sequence is CFRP/2A12 is smaller than when the laminated sequence is 2A12/CFRP.展开更多
The alloy AZ91 containing calcium was prepared under protection of a mixed gas atmosphere of SF6 （1%, volume fraction） and CO2. The added calcium mainly dissolves into the Mg17Al12 phase in the alloy and increases i...The alloy AZ91 containing calcium was prepared under protection of a mixed gas atmosphere of SF6 （1%, volume fraction） and CO2. The added calcium mainly dissolves into the Mg17Al12 phase in the alloy and increases its melting point and the thermal stability. The empirical electron theory （EET） of solid and molecules was used to calculate the valence electron structures （VES） of Mg17Al12 phase with different amounts of calcium additions. The theoretical calculations indicate that calcium dissolved in Mg17Al12 phase increases the strengths of atomic bonds that control the thermal stability of Mg17Al12 phase, and also makes the distribution of valence electrons on the dominant bond network as well as in the whole unit cell of Mg17Al12 more uniform, which are consistent with the experimental results.展开更多
文摘A series of YTi(Fe_(1-x)_(11)alloy with x=0.00,0.01,0.03,0.04,0.05,0.07 and 0.10 has been investigated by measurement of the structural properties and ^(57)Fe M(?)ssbauer experiments.The pure ThMn_(12)-structure phase exists at x≤0.03 and is absent at x>0.03.The reasons for lower satura- tion magnetization and lower energy product of the ThMn_(12)-structure compounds were given.The crystal structure relations between R_2Fe_(17)-structure and ThMn_(12)-structure were discussed.Comparing with the R_2Fe_(17)and R_2Fe_(14)B compounds,the ThMn_(12)-structure RFe_(12-x)M_x compounds have the same magnetic moment of Fe at x=0.The potential for increasing the saturation magnetization of ThMn_(12)-structure compounds may be enhanced by the addition of stabilization elements.
基金This work was financially supported by the National Natural Science Foundation of China (No. 20362002), the 100 Young and Middle-aged Disciplinary Leaders in Guangxi Higher Education Institutions and the Science Foundation for Youth of Guangxi Province (No. 0575046)
文摘Methyl 12-bromo-13,14-furoxan-deisopropyldehydroabietate, C18H22BrN2O4, has been synthesized and characterized by IR,^1H NMR, ^13C NMR and single-crystal X-ray diffraction method. It crystallizes in orthorhombic, space group P212121 with a = 6.652（2）, b = 12.832（4）, c = 20.483（6）°A, V = 1748.5（9） °A^3, Z = 4, Mr = 410.29, D, = 1.559 g/cm^3, λ= 0.71070°A, μ（MoKα） = 2.377 mm^-1, F（000） = 844, the final R = 0.0243 and wR = 0.0533 for 3780 observed reflections with I〉 2σ（I）. The C-H and bromine atom are involved in intermolecular hydrogen bonds which link the molecules into a one-dimensional chain.
文摘Ni80Fe20/Ni48Fe12Cr40 bilayer films and Ni80Fe20 monolayer films were deposited at room temperature on SiO2/Si（100） substrates by electron beam evaporation. The influence of the thickness of the Ni48Fe12Cr40 underlayer on the structure, magnetization, and magnetoresistance of the Ni80Fe20/Ni48Fe12Cr40 bilayer film was investigated. The thickness of the Ni48Fe12Cr40 layer varied from about 1 nm to 18 nm while the Ni80Fe20 layer thickness was fixed at 45 nm. For the as-deposited bilayer films the introducing of the Ni48Fe12Cr40 underlayer promotes both the （111） texture and grain growth in the Ni80Fe20 layer. The Ni48Fe12Cr40 underlayer has no significant influence on the magnetic moment of the Ni80Fe20/Ni48Fe12Cr40 bilayer film. However, the coercivity of the bilayer film changes with the thickness of the Ni48Fe12Cr40 undedayer. The optimum thickness of the Ni48Fe12Cr40 underlayer for improving the anisotropic magnetoresistance effect of the Ni80Fe20/Ni48Fe12Cr40 bilayer film is about 5 nm. With a decrease in temperature from 300 K to 81 K, the anisotropic magnetoresistance ratio of the Ni80Fe20 （45 nm）/Ni48Fe12Cr40 （5 nm） bilayer film increases linearly from 2.1% to 4.8% compared with that of the Ni80Fe20 monolayer film from 1.7% to 4.0%.
基金This work was supported by the Natural Science Foundation of Shandong Province (Y2002G11)
文摘Geometries, energies, and vibrational frequencies for two C4N12O4 isomers with pagodane- and isopagodane-like structures have been calculated at the B3LYP/6-31G＊ level.Isomers 1 and 2 are of D2h and D2d symmetry, respectively. Heats of formation for the two C4N12O4 isomers have been estimated in this paper, indicating they would be reasonable candidates for high energy density materials.
文摘A novel adenine(Ade) salt of 12-phosphotungstic acid was synthesized and characterized by elemental analyses,IR, 1H NMR,CV and single crystal X-ray diffraction. The compound crystallized in a triclinic system with a space group P 1 and a =1.3108(3) nm, b =1.3515(3) nm,c =1.3870(3) nm, V =2.0217(7) nm 3,Z =1,R _1=0.0391,wR _2=0.0959. The structure unit of the complex was constructed from [HPW_ 12 ·O_ 40 ] -,(C_5H_6N_5) + and C_3H_7NO,which further extends to form a novel three-dimensional host-guest network via hydrogen-bonding interactions. The anti-tumor activity of the compound was examined in two human tumor cell lines in vitro .
文摘The effect of substitution of Mn on the structure and magnetic properties of HoFe 12- x Mn x (x =2 0, 3 0, 4 0 and 5 0) compounds was investigated. All the HoFe 12x Mn x compounds studied crystallize in ThMn 12 type of structure. The lattice constants and unit cell volume increase monotonously with increasing Mn concentration. The Curie temperature and the moments of the transition metal sublattice of HoFe 12- x Mn x compounds decrease monotonously with increasing Mn content. A minimum appears at x =3 0 in the Mn concentration dependence of the saturation magnetization of HoFe 12- x Mn x compounds. A compensation point appears in the M(t) curve of the compound with x =4 0. The mean field constant n RT of HoFe 9Mn 3 was calculated.
基金B.V.Konovalova., N.A. Koneva and E.V.Kozlov acknowledge the INTAS for the partial support of this research under INTAS97-319
文摘It was revealed that an average energy of special boundaries is proportional to APB energy in the alloys with the L12 superstructure. This fact proves the appearance of the GAPBs in the planes of location of special boundaries in coincidence sites of ordered alloys. It was determined that the more energy of special boundaries in ordered alloys, the more energy of complex stacking fault. There is a correlation between the distribution of special boundaries as a function its relative energy and ordering energy: the more ordering energy, the more degree of washed away of distribution. The correlation between average relative energy of special boundaries and ordering energy was detected: the more ordering energy, the more average energy of special boundaries. The reverse dependence between ordering energy and average number of special boundaries in grains limited by boundaries of general type was discovered.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11264020 and 11364023)the Science Foundation of Education Committee of Jiangxi Province,China(Grant Nos.GJJ12463,11530,and 11540)+1 种基金the Doctoral Startup Fund of Jingguangshang University,China(Grant No.JZB11003)the Key Subject of Atomic and Molecular Physics in Jiangxi Province,China(Grant No.2011-2015)
文摘The geometric structures, electronic properties, total and binding energies, harmonic frequencies, the highest occupied molecular orbital to the lowest unoccupied molecular orbital energy gaps, and the vertical ionization potential energies of small LimBn （m＋ n = 12） clusters were investigated by the density functional theory B3LYP with a 6-31 I＋G （2d, 2p） basis set. All the calculations were performed using the Gaussian09 program. For the study of the LimBn clusters, the global minimum of the B 12 cluster was chosen as the starting point and the boron atoms were gradually replaced by Li atoms. The results showed that as the number of Li atoms increased, the stability of the LimBn cluster decreased and the physical and chemical properties became more active. In addition, on average there was a large charge transfer from the Li atoms to the B atoms.
基金the grants from Fujian Explore Grant for Young Scientists (2007J0294)CAS (KSCX2-YW-R-082)+1 种基金NNSFC (30430190, 30625011)MOST (2007CB914304 and 2006AA02A313)
文摘10C12 is an anticoagulant antibody identified from a phage display single-chain Fv human antibody library. It can be directed at the calcium-stabilized Gla domain of Factor-IX, an important coagulation factor in intrinsic pathway of blood coagulation cascade, and interfere with membrane anchoring of Factor IX, thus inhibiting blood coagulation function. 10C12 has been demonstrated as an effective anti-coagulant in attenuating thrombosis in several different animal models. Here, we report the crystal structure of the Fab fragment of 10C12. The crystal contains two Fab molecules in the asymmetric unit with identical conformation, forming a lattice with large cavities. In addition, comparison of this free Fab with the antigen-bound structure of 10C12 shows no change in CDR conformations and the relative disposition of the variable subunits of H and L chains, suggesting the rigid conformation of this 10C12 Fab and a lock-and-key mechanism of antibody-antigen recognition for 10C12.
基金supported by the Natural Science Foundation of Tianjin (Nos. 08JCZDJC15200 and 11JGYBJC14300)the Program for New Century Excellent Talents in University (No. NCET-08-0911)
文摘Progesterone（1） was biotransformed into the title compound 12β,15α-dihydroxy-progesterone（2） with Colletotrichum lini AS3.4486.The biotransformation process was monitored with HPLC.The structure of 2 was determined by 1H NMR,13C NMR,ESI-MS and single-crystal X-ray diffraction.The crystal of the compound belongs to orthorhombic,space group P212121 with a = 8.0671（9）,b = 12.3970（15）,c = 18.532（3） ,Z = 4,V = 1853.3（4）3,Dc = 1.242 mg/m3,μ = 0.084 mm-1,F（000） = 752,R = 0.0373 and wR = 0.0850.Single-crystal X-ray diffraction analysis reveals that a 1D supramolecular structure of 2 has been constructed by multiply intermolecular O（2）-H（2）…O（4） and O（3）-H（3）…O（2） H-bonding interactions.
文摘The structure, chemical bonds and hydra-tion activity of C12A were studied by SCC-DV-Xa method of computational quantum chemistry. The calculated results show that Ca-O bond will be first broken off when C12A hydrates, the reactivity of Al(2)O4 tetrahedron is superior to that of Al(1)O4 tet, thedron and the rupture of the Al-O-Al chain composed of two types of AlO4 tetrahedra under the action of water lies in the very weak Al(2)-O(2) bonds. the Al-O bond strength of C12A7 is between C3A and C11A7·CaF2.
文摘Abstract： We mainly studied effects of nucleation parameters （ △Tv,max and △Ts,max ） and superheat on solidification structure of ZG12MnMoV low-alloy steel by integration of CAFE and experimentation. The result shows that grain dimension is not only related with nucleation parameters, but also with superheat. The smaller△Tv,max and △Ts,max get, the tinier grain turns. The lab experimentation on optimum parameter is conducted, the mean diameter of grain in lab test specimen is 153.2 lain, and the mean diameter calculated by CAFE model is 151.1 μm. The calculated solidification structure agrees with the experimental result in the main.
文摘CFRP/2A12 laminated structure due to the large difference in the properties of the material,very easy to produce defects when making holes,affecting the quality of the workpiece,and thus the connection performance of the two materials.The root cause of the poor quality of CFRP/2A12 laminated structure is the difference in material removal mechanism and the complexity of tool processing conditions.Therefore,this paper analyzes the effects of different process parameters on the pore-forming quality of the laminated material through experiments,reveals the change law of cutting force of the CFRP/2A12 laminated structure,and determines the optimal process parameters.The results show:The axial force generated by the drill when it enters half of CFRP is the largest,which is much larger than the axial force generated when drilling 2A12 aluminum alloy plate,and the thickness of the laminated metal plate is great for drilling.The hole formation sequence of the laminated structure has a significant effect on the cutting force.The axial force when the laminated sequence is CFRP/2A12 is smaller than when the laminated sequence is 2A12/CFRP.
文摘The alloy AZ91 containing calcium was prepared under protection of a mixed gas atmosphere of SF6 （1%, volume fraction） and CO2. The added calcium mainly dissolves into the Mg17Al12 phase in the alloy and increases its melting point and the thermal stability. The empirical electron theory （EET） of solid and molecules was used to calculate the valence electron structures （VES） of Mg17Al12 phase with different amounts of calcium additions. The theoretical calculations indicate that calcium dissolved in Mg17Al12 phase increases the strengths of atomic bonds that control the thermal stability of Mg17Al12 phase, and also makes the distribution of valence electrons on the dominant bond network as well as in the whole unit cell of Mg17Al12 more uniform, which are consistent with the experimental results.
