Fracture behavior and reliability of brazed alumina joints via Mo–Mn process and active metal brazing

Yang, S. H.; Kang, S.

doi:10.1557/jmr.2000.0321

Cited by 18 publications

(7 citation statements)

References 9 publications

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“…Under these conditions, the vitreous phase present in the bulk of the ceramic substrate moves to its surface by capillary forces and react with Mn at around 1400°C forming spinels, such as MnAl 2 O 4 (when joining Al 2 O 3 ). Simultaneously, Mo particles are sintered onto the spinel layer, whose main function is to link the ceramic substrate to the metallic film formed [39,69,80]. Although the method requires an additional hightemperature step, ceramics previously metallized by the Mo-Mn process are commercially available.…”

Section: Brazing and Metallizationmentioning

confidence: 99%

Review Article: recent advances in metal-ceramic brazing

2003

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Metal-ceramic joining has slowly but steadily become an important manufacturing step. The evolution of joining processes has allowed ceramics to be used in combination with metals in a number of hybrid devices from traditional light bulbs and seals to improved cutting tools and modern monitoring and measuring electronic devices. New joining methods and newer approaches to conventional methods have been developed aiming at joints characterized by improved reliability, and interfaces capable of withstanding high-temperature resistance with minimum residual stresses. A summary of recent improvements on alternative approaches to ceramic-metal joining as well as new developments on brazing are presented herein. The present review also focuses on recent advances towards brazing metallized ceramics and the selection of filler alloys, since in a scenario that includes joining by laser and direct bonding with liquid transient phases, brazing continues to be by far the most widely used approach to joining as a result of its low-cost and possibility to join intricate geometries for large-scale production. Finally, methods to evaluate the mechanical strength and residual thermal stresses are presented in addition to alternative approaches to minimize residual stresses and, consequently, improve joint reliability.

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Section: Brazing and Metallizationmentioning

confidence: 99%

Review Article: recent advances in metal-ceramic brazing

2003

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“…In 1956, H. Lafoge of the United States completed the activated Mo-Mn method, which is widely used in the metal ceramic connection field. CM technology combines ceramics and metals together, which makes them complementary in performances, enhancing the application scope [2].…”

Section: Introductionmentioning

confidence: 99%

“…The coating has no volume shrinkage process cooled in the molten state, so the residual stress is small and the porosity is low. (2) The oxide content of CS coatings is roughly equivalent to bulk materials: Due to the low spraying temperature, oxidation cannot be occurred at a high probability. The research results show that CS technology is of great significance to the preparation of easily oxidised coatings such as titanium and its alloys, because the degree of oxidation of the sprayed material is relatively low during the spraying process.…”

Section: Introductionmentioning

confidence: 99%

Cold spray for ceramic metallisation: a review

Han

Wang

et al. 2021

Advances in Applied Ceramics

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Since invented in 1980s, cold spraying (CS) has received numerous attentions recently because of its low heat input and high efficiency. Severe plastic deformation induced by high-velocity impaction makes the particles with temperature below the melting point deposited on the substrate. Theoretically, the coating obtained by CS is dense and free of oxidation, so excellent thermal and electrical conductivity can be obtained, which is ideal for ceramic metallisation (CM). Many studies have been done on the CS CM to study the coating structures, bonding mechanism and performances. Mechanical occlusion is considered to be the main bonding type at the interface, local melting plays a small role in the bonding, but local melting improves the bonding strength significantly. However, the specific bonding mechanism of CS CM is still unclear, especially in some metal/ceramic systems with bonding strength greater than 10 MPa, the bonding mechanisms need to be further studied. CS is also difficult to metallise some ceramics, which requires complicated design. Thus, aiming to improve the reliability and the extent of the application of CS CM, a thorough review should be made. In the present paper, the bonding mechanisms of CS metal coating on ceramic proposed by previous researches were summarised to help the researchers a better and quicker understanding for the CS CM. The factors influencing the properties were introduced. The author also made an outlook for the future development of CS in CM.

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“…The activated Mo-Mn method is widely used at industrial scale for ceramic metallizing due to its high efficiency and reliability [19]. The process mainly includes the following two steps [20].…”

Section: Introductionmentioning

confidence: 99%