The magneto-caloric effect （MCE） of a Gd55Co25Al18Sn2 bulk metallic glass （BMG） is investigated. The Gd55Co25AllsSn2 as-cast rod prepared by a water-cooled copper mold suction casting method exhibits typi- cal amo...The magneto-caloric effect （MCE） of a Gd55Co25Al18Sn2 bulk metallic glass （BMG） is investigated. The Gd55Co25AllsSn2 as-cast rod prepared by a water-cooled copper mold suction casting method exhibits typi- cal amorphous characteristics. The maximum magnetic entropy change （--ASPmeak） and the magnetic refrigerant capacity （Re） of the BMG under a field of 5 T are about 9.32 J.kg-X.K 1 and 832 J.kg-1, respectively, both of which are larger than the values of the Gd55 Co25A120 BMG. The mechanism for the improved MCE by minor Sn addition is studied and the field dependence of - magneto-caloric behaviors of Gd55Co25Al18Sn2 BMG ASPmeak is investigated for a better understanding on the展开更多
The Southern Great Xing’an Range(SGXR) hosts a number of Early Cretaceous Sn and associated metal deposits, which can be divided into three principal types according to their geological characteristics: skarn type de...The Southern Great Xing’an Range(SGXR) hosts a number of Early Cretaceous Sn and associated metal deposits, which can be divided into three principal types according to their geological characteristics: skarn type deposits, porphyry type deposits and hydrothermal vein type deposits. Fluid inclusion assemblages of different types of deposits are quite different, which represent the complexities of metallogenic process and formation mechanism. CH4 and CO2 have been detected in fluid inclusions from some of deposits, indicating that the ore-forming fluids are affected by materials of Permian strata. Hydrogen and oxygen isotope data from ore minerals and associated gangue minerals indicate that the initial ore fluids were dominated by magmatic waters, some of which had clearly exchanged oxygen with wall rocks during their passage through the strata. The narrow range for the δ34S values presumably reflects the corresponding uniformity of the ore forming fluids, and these δ34S values have been interpreted to reflect magmatic sources for the sulfur. The comparation between lead isotope ratios of ore minerals and different geological units’ also reveals that deeply seated magma has been a significant source of lead in the ores.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 51171100 and 51271103
文摘The magneto-caloric effect （MCE） of a Gd55Co25Al18Sn2 bulk metallic glass （BMG） is investigated. The Gd55Co25AllsSn2 as-cast rod prepared by a water-cooled copper mold suction casting method exhibits typi- cal amorphous characteristics. The maximum magnetic entropy change （--ASPmeak） and the magnetic refrigerant capacity （Re） of the BMG under a field of 5 T are about 9.32 J.kg-X.K 1 and 832 J.kg-1, respectively, both of which are larger than the values of the Gd55 Co25A120 BMG. The mechanism for the improved MCE by minor Sn addition is studied and the field dependence of - magneto-caloric behaviors of Gd55Co25Al18Sn2 BMG ASPmeak is investigated for a better understanding on the
基金supported by Key Discipline Construction Projects of Institute of Disaster Prevention (Quaternary Geology)Prospecting Projects of National Important Mineral Concentration Areas of Development Research Center of China Geological Survey (0747-1861SITCN149)
文摘The Southern Great Xing’an Range(SGXR) hosts a number of Early Cretaceous Sn and associated metal deposits, which can be divided into three principal types according to their geological characteristics: skarn type deposits, porphyry type deposits and hydrothermal vein type deposits. Fluid inclusion assemblages of different types of deposits are quite different, which represent the complexities of metallogenic process and formation mechanism. CH4 and CO2 have been detected in fluid inclusions from some of deposits, indicating that the ore-forming fluids are affected by materials of Permian strata. Hydrogen and oxygen isotope data from ore minerals and associated gangue minerals indicate that the initial ore fluids were dominated by magmatic waters, some of which had clearly exchanged oxygen with wall rocks during their passage through the strata. The narrow range for the δ34S values presumably reflects the corresponding uniformity of the ore forming fluids, and these δ34S values have been interpreted to reflect magmatic sources for the sulfur. The comparation between lead isotope ratios of ore minerals and different geological units’ also reveals that deeply seated magma has been a significant source of lead in the ores.
