Enhanced bonding of Al2O3/Al2O3 joints brazed by Ni50Ti50 master alloy interlayer
نویسندگان
چکیده
Al2O3 ceramics were successfully brazed under high vacuum conditions using the active Ni50Ti50 master alloy at 1320 °C with different holding time. The interfacial microstructure of joint was characterized SEM, EDS and TEM. effects time on evolution mechanical properties joints investigated. results revealed that typical structure Al2O3/Ni–Ti for 45 min Al2O3/AlNi2Ti + Ni2Ti4O/Ni2Ti4O/TiNi. Ni2Ti4O continuously distributed as a layer adjacent to substrate, whereas columnar AlNi2Ti phase existed in near side. With prolongation time, thickness increased obviously, became longer coarser. maximum shear strength 109 MPa obtained when min. hardness, Young's modulus elastic recovery phases across gradient property. reaction appropriate found beneficial enhancing Al2O3/Ni–Ti/Al2O3 strength.
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ژورنال
عنوان ژورنال: Vacuum
سال: 2021
ISSN: ['0042-207X', '1879-2715']
DOI: https://doi.org/10.1016/j.vacuum.2020.110000