Effects of ErCl3 addition on mechanical properties, microstructure, fractography of AZ91 magnesium alloy were studied. The results show that the ErCl3 addition in AZ91 magnesium alloy has the characteristics of igniti...Effects of ErCl3 addition on mechanical properties, microstructure, fractography of AZ91 magnesium alloy were studied. The results show that the ErCl3 addition in AZ91 magnesium alloy has the characteristics of ignition-proof and purification, and also improves the tensile strength σb and elongation δ. Due to the addition of 1.8% ErCl3, the σb and δ can be improved from 156 MPa and 1.8% to 220 MPa and 4.1% respectively, that is, σb and δ can be increased by 41% and 128%, respectively. When increasing the content of ErCl3 further, Al7ErMn5 phase forms, bulky inclusion appears, which leads to the decrease of mechanical properties of the alloy. The tensile fracture mechanism is also traverse grain and quasi-cleavage fracture, which is not changed by ErCl3 addition.展开更多
The phase diagram of ternary system ErCl_3-CaCl_2-MgCl_2 has been investigated be means of differentialthermal analysis (DTA). It was found that there were three surfaces corresponding to the primary crystalliza-tion ...The phase diagram of ternary system ErCl_3-CaCl_2-MgCl_2 has been investigated be means of differentialthermal analysis (DTA). It was found that there were three surfaces corresponding to the primary crystalliza-tion of ErCl_3, CaCl_2 and MgCl_2 respectively, three univariant curves related to the a seondary crystallizationand a ternary eutectic point E (67. 8 wt% ErCl_3, 17. 2 wt% CaCl_2, 15. 0 wt% MgCl_2. 524°C ) in the systemErCl_3-CaCl_2-MgCl_2.展开更多
The phase diagram of ternary system ErCl_3-CaCl_2-LiCl has been investigated by means of DTA. It was found that there are four fields corresponding to the primary crystallization of ErCl_3,CaCl_2, LiCl and Li_3ErCl_6 ...The phase diagram of ternary system ErCl_3-CaCl_2-LiCl has been investigated by means of DTA. It was found that there are four fields corresponding to the primary crystallization of ErCl_3,CaCl_2, LiCl and Li_3ErCl_6 respectively, five univariant curves related to the secondary crystallization, a ternary eutectic E(58. 5% ErCl_3, 23. 7% CaCl_2, 17. 8%LiCl, 397 ℃) and a ternary peritectic point P(52. 5% ErCl_3, 27. 2% CaCl_2, 20. 3% LiCl, 428 ℃) in the phase diagram. Two ternary reactions occur in the system: L =ErCl_3 + Li_3ErCl_6 +CaCl_2; L+LiCl=Li_3ErCl_6 +CaCl_2.展开更多
文摘Effects of ErCl3 addition on mechanical properties, microstructure, fractography of AZ91 magnesium alloy were studied. The results show that the ErCl3 addition in AZ91 magnesium alloy has the characteristics of ignition-proof and purification, and also improves the tensile strength σb and elongation δ. Due to the addition of 1.8% ErCl3, the σb and δ can be improved from 156 MPa and 1.8% to 220 MPa and 4.1% respectively, that is, σb and δ can be increased by 41% and 128%, respectively. When increasing the content of ErCl3 further, Al7ErMn5 phase forms, bulky inclusion appears, which leads to the decrease of mechanical properties of the alloy. The tensile fracture mechanism is also traverse grain and quasi-cleavage fracture, which is not changed by ErCl3 addition.
文摘The phase diagram of ternary system ErCl_3-CaCl_2-MgCl_2 has been investigated be means of differentialthermal analysis (DTA). It was found that there were three surfaces corresponding to the primary crystalliza-tion of ErCl_3, CaCl_2 and MgCl_2 respectively, three univariant curves related to the a seondary crystallizationand a ternary eutectic point E (67. 8 wt% ErCl_3, 17. 2 wt% CaCl_2, 15. 0 wt% MgCl_2. 524°C ) in the systemErCl_3-CaCl_2-MgCl_2.
文摘The phase diagram of ternary system ErCl_3-CaCl_2-LiCl has been investigated by means of DTA. It was found that there are four fields corresponding to the primary crystallization of ErCl_3,CaCl_2, LiCl and Li_3ErCl_6 respectively, five univariant curves related to the secondary crystallization, a ternary eutectic E(58. 5% ErCl_3, 23. 7% CaCl_2, 17. 8%LiCl, 397 ℃) and a ternary peritectic point P(52. 5% ErCl_3, 27. 2% CaCl_2, 20. 3% LiCl, 428 ℃) in the phase diagram. Two ternary reactions occur in the system: L =ErCl_3 + Li_3ErCl_6 +CaCl_2; L+LiCl=Li_3ErCl_6 +CaCl_2.
