J. Mater. Sci. Technol. ›› 2016, Vol. 32 ›› Issue (12): 1326-1331.DOI: 10.1016/j.jmst.2016.03.007
• Orginal Article • Previous Articles Next Articles
Tan Zhen1,Wang Lu1,2,Xue Yunfei1,2,*(),Cheng Xingwang1,2,Zhang Long3
Received:
2015-06-09
Accepted:
2015-11-17
Online:
2016-12-20
Published:
2017-02-16
Contact:
Xue Yunfei
Tan Zhen,Wang Lu,Xue Yunfei,Cheng Xingwang,Zhang Long. Structural Modification of Al65Cu16.5Ti18.5 Amorphous Powder through Annealing and Post Milling: Improving Thermal Stability[J]. J. Mater. Sci. Technol., 2016, 32(12): 1326-1331.
Phase | Structure | Space group | Lattice parameters (experimental) | Lattice parameters (theoretical) | JCPDS |
---|---|---|---|---|---|
TiH2 | Tetragonal | I4/mmm (139) | a = 0.309 nm, b = 0.309 nm, c = 0.415 nm | a = 0.3120 nm, b = 0.3120 nm, c = 0.4180 nm | 09-0371 |
Al5CuTi2 | Cubic | Pm3m (221) | a = b = c = 0.394 nm | a = b = c = 0.3927 nm | 45-0168 |
Al2Cu | Tetragonal | I4/mmm (140) | a = 0.610 nm, b = 0.610 nm, c = 0.485 nm | a = 0.6065 nm, b = 0.6065 nm, c = 0.4873 nm | 25-0012 |
Al3Ti | Tetragonal | I4/mmm (139) | a = 0.385 nm, b = 0.385 nm, c = 0.860 nm | a = 0.38537 nm, b = 0.38537 nm, c = 0.85839 nm | 37-1449 |
AlCu2Ti | Cubic | Fm-3m (221) | a = b = c = 0.603 nm | a = b = c = 0.6019 nm | 51-0888 |
Cu9Al4 | Cubic | P-43m (215) | a = b = c = 0.872 nm | a = b = c = 0.8703 nm | 24-0003 |
Table 1. Detailed information of all the crystalline phases corresponding to the peaks on the XRD patterns
Phase | Structure | Space group | Lattice parameters (experimental) | Lattice parameters (theoretical) | JCPDS |
---|---|---|---|---|---|
TiH2 | Tetragonal | I4/mmm (139) | a = 0.309 nm, b = 0.309 nm, c = 0.415 nm | a = 0.3120 nm, b = 0.3120 nm, c = 0.4180 nm | 09-0371 |
Al5CuTi2 | Cubic | Pm3m (221) | a = b = c = 0.394 nm | a = b = c = 0.3927 nm | 45-0168 |
Al2Cu | Tetragonal | I4/mmm (140) | a = 0.610 nm, b = 0.610 nm, c = 0.485 nm | a = 0.6065 nm, b = 0.6065 nm, c = 0.4873 nm | 25-0012 |
Al3Ti | Tetragonal | I4/mmm (139) | a = 0.385 nm, b = 0.385 nm, c = 0.860 nm | a = 0.38537 nm, b = 0.38537 nm, c = 0.85839 nm | 37-1449 |
AlCu2Ti | Cubic | Fm-3m (221) | a = b = c = 0.603 nm | a = b = c = 0.6019 nm | 51-0888 |
Cu9Al4 | Cubic | P-43m (215) | a = b = c = 0.872 nm | a = b = c = 0.8703 nm | 24-0003 |
Fig. 2. (a) TEM (inset: the corresponding SAED pattern) and (b) HRTEM (insets: the corresponding FFT patterns) images of the as-milled powder; (c) EDS spot analysis corresponding to the amorphous phase (marked by area I); (d) TEM (inset: the corresponding SAED pattern) and (e) HRTEM images of the annealed powder at 773 K; (f) TEM (inset: the corresponding SAED pattern) and (g) HRTEM images of the annealed powder at 873 K.
Fig. 3. TEM (a) and corresponding EDS results (b-g) of the annealed powder at 773 K; (b-d) map analysis of Al, Ti, and Cu corresponding to (a), respectively; (e-g) spot analysis corresponding to areas I, II, and III in (a), respectively.
Fig. 4. (a) XRD patterns of the APMed powder (annealing at 773 K followed by post milling for different times); (b) HRTEM image of the APMed powder (annealing at 773 K followed by post milling for 12 h).
Fig. 6. TEM images (a-d) and EDS results (e-f) of the APMed powder (annealing at 773 K followed by post milling for 30 h). (a) typical TEM image; (b) corresponding SAED pattern in (a); (c) HRTEM image of the amorphous region (inset: corresponding FFT patterns); (d) HRTEM image of the crystal region (inset: corresponding FFT patterns); (e) spot analysis of the area I in (c); (f) spot analysis of the area II in (d).
Fig. 7. XRD patterns of the annealed APMed powder (annealing at 623, 673, 773, and 873 K followed by post milling for 30 h and subsequent annealing at 773 K for 30 min).
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