Joining of alumina and steel by a laser supported brazing process

Rohde, Magnus; Südmeyer, I.; Urbanek, A.; Torge, Maika

doi:10.1016/j.ceramint.2007.11.007

Cited by 51 publications

(23 citation statements)

References 11 publications

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“…Many ceramic heat exchanger designs thus use the block structure of primary components, which are further machined and are bonded together inside an oven (Schulte-Fischedick et al, 2007;Schmitt et al, 2005). However, in recent years, some newer bonding techniques, such as laser welding, have shown promise for joining ceramic components (Rohde et al, 2009;Lippmann et al, 2004). Given their advantage of working at high temperatures and the general push to achieve higher thermal efficiencies, further developmental efforts are expected in the near future.…”

Section: Ceramicmentioning

confidence: 99%

Recent Developments in High Temperature Heat Exchangers: A Review

Ohadi¹,

Zhang²,

Keramati³

et al. 2018

Frontiers in Heat and Mass Transfer

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Heat exchangers are key components of most power conversion systems, a few industrial sectors can particularly benefit from high temperature heat exchangers. Examples include conventional aerospace applications, advanced nuclear power generation systems, and high efficiency stationary and mobile modular fossil fuel to shaft power/electricity conversion systems. This paper provides a review of high temperature heat exchangers in terms of build materials, general design, manufacturing techniques, and operating parameters for the selected applications. Challenges associated with conventional and advanced fabrication technologies of high temperature heat exchangers are discussed. Finally, the paper outlines future research needs of high temperature heat exchangers.

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Section: Ceramicmentioning

confidence: 99%

Recent Developments in High Temperature Heat Exchangers: A Review

Ohadi¹,

Zhang²,

Keramati³

et al. 2018

Frontiers in Heat and Mass Transfer

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“…Among different brazing processes 16) , laser brazing 10,11,13) has good characteristics for use as a dissimilar joining process in comparison with conventional furnace brazing 8,12) because of advantages such as a short heating time, small heating area, suppression of damage to the base materials, and not requiring a furnace. Therefore, we tried to develop a laser brazing process of ceramics and metals that can be carried out using simple equipment, and an easy system of controlling the atmosphere in a short heating time, without expensive equipment such as a high-vacuum system.…”

Section: Introductionmentioning

confidence: 99%

“…The brazing process is used in many industrial fields for developing engineering structures and electronic devices [1][2][3][4][5][6][7][8][9][10][11][12][13] . This process has several advantages making it suitable for use in joining dissimilar materials precisely.…”

Section: Introductionmentioning

confidence: 99%

Laser Brazing of a Hexagonal Boron Nitride Block to a Cemented Carbide Plate with Silver-Copper-Titanium Alloy Filler in Argon Atmosphere Including Different Oxygen Contents

Sechi¹,

Nagatsuka

Fujimoto

et al. 2017

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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Relationship between oxidation of Ag-Cu-Ti braze alloy and oxygen contents was investigated in the laser brazing of a hexagonal boron nitride block to cemented carbide plate in Ar atmosphere. The laser brazing was conducted in Ar-flow atmosphere in a vacuum chamber, and changing Ar-flow rate with and without pre-evacuation. No oxidation of the braze alloy was found after 3-min Ar-flow atmosphere over 5 L/min without pre-evacuation and at 5 L/min with pre-evacuation. When the Ar flow rate increased to 10 L/min without pre-evacuation, the oxygen content decreased to 3.8 ppm. In this case, the average shear strength of the brazed joint was about 8 MPa and a fracture occurred at the hexagonal, boron nitride side of the specimen, near the interface.

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“…Using stainless steel foams, Shirzada et al achieved bonding between alumina and AISI 316 stainless steel with shear strengths up to 33 MPa. 6 16) and 80 MPa, 18) respectively. All the reported test results had specimens brazed at a very slow cooling rate, less than 0.083°C/s.…”

mentioning

confidence: 99%

“…However, the joint needs to be applied in small dimension, such as the high vacuum feedthrough or at slow heating and cooling rates to avoid thermally induced cracking. [14][15][16][17][18] The brazed joint is not reliable with large scattering in bond strength due to the brittle nature of the interfacial reaction layer(s).…”

mentioning

confidence: 99%

Joining of Al2O3 to 316SS Using Braze-infiltrated Ni Net

et al. 2011

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The combination of excellent properties of ceramic and metal for engineering application has become a crucial issue since 1980s. Ceramic-metal joining is considered as a key technique in industry for several decades. However, residual thermal stress and wettability are two major concerns in making the ceramic-metal joint. Several approaches have been proposed in literatures. For instance, molybdenummanganese metallization process has been applied with long history for ceramic-metal joining.

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Joining of alumina and steel by a laser supported brazing process

Cited by 51 publications

References 11 publications

Recent Developments in High Temperature Heat Exchangers: A Review

Recent Developments in High Temperature Heat Exchangers: A Review

Laser Brazing of a Hexagonal Boron Nitride Block to a Cemented Carbide Plate with Silver-Copper-Titanium Alloy Filler in Argon Atmosphere Including Different Oxygen Contents

Joining of Al2O3 to 316SS Using Braze-infiltrated Ni Net

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