Ultrasonic-assisted brazing of sapphire with high strength Al–4.5Cu–1.5Mg alloy

Chen, Wei; Li, Shuqi; Yan, Jiuchun; He, Jie; Liu, Yan

doi:10.1016/j.ceramint.2015.02.149

Cited by 33 publications

(10 citation statements)

References 23 publications

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“…The peculiar properties of advanced ceramic materials and the resulting difficulties in bonding them with metals and/or the most challenging issue relate to the coating of advance ceramics with metals. Despite a large group of already developed methods and techniques of bonding ceramics with metals, obtaining ceramic-metal joints with high operational properties on the industrial scale will still be the subject of intense research [45][46][47]. Many new concepts for the production of ceramic-metal joints are currently being developed, but due to the significant differences in the properties of the components, all the bonding methods are quite troublesome in mass production.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Structure Investigation of Titanium Metallization Coating Deposited onto AlN Ceramics Substrate by Means of Friction Surfacing Process

et al. 2019

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The article presents selected properties of a titanium metallization coating deposited on aluminum nitride (AlN) ceramics surface by means of the friction surfacing method. Its mechanism is based on the formation of a joint between the surface of an AlN ceramics substrate and a thin Ti coating, involving a kinetic energy of friction, which is directly converted into heat and delivered in a precisely defined quantity to the resulting joint. The largest effects on the final properties of the obtained coating include the high affinity of titanium for oxygen and nitrogen and a relatively high temperature for the deposition process. The titanium metallization coating was characterized in terms of surface stereometric structure, thickness, surface morphology, metallographic microstructural properties, and phase structure. The titanium coating has a thickness ranging from 3 to 7 μm. The phase structure of the coating surface (XPS investigated) is dominated by TiNxOy with the presence of TiOx, TiN, metallic Ti, and AlN. The phase structure deeper below the surface (XRD investigated) is dominated by metallic Ti with additional AlN particles originating from the ceramic substrate due to friction by titanium tools.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Structure Investigation of Titanium Metallization Coating Deposited onto AlN Ceramics Substrate by Means of Friction Surfacing Process

et al. 2019

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“…金结合的一种连接方法, 对陶瓷而言, 钎焊则是最主要的连接方法。在现有的钎焊理论中, 润湿是钎焊的基础, 作为钎料的金属熔液只有润湿基体(金属、陶瓷)才能实现钎焊连接。但是金属熔液不能润湿常用的工程陶瓷(Al 2 O 3 、AlN 等), 只能采用在陶瓷表面上烧结或镀覆 [1][2][3] 能与其反应的活性金属层的金属化方法, 或在钎料中加入活性金属组分的活性钎料钎焊法 [4][5][6][7] , 使陶瓷表面形成可被金属润湿的反应过渡层而实现钎焊连接, 因而现有的陶瓷钎焊接头中都存在不同程度影响接头性能的反应过渡层。 Al 2 O 3 因具有许多优异的性能而得到广泛应用, 如在电子工业中, 作为封装基片需要将 Al 2 O 3 与金属如 Cu [8][9] 、Al [10] 、Ti [11] 等进行钎焊连接。为了使金属钎料润湿 Al 2 O 3 , 一般只能采用具有脆性反应过渡层的方式。例如, 在 Al 2 O 3 直接覆铜法中 [8] , Al [12][13][14][15][16][17] ,…”

Section: 钎焊是通过熔融金属润湿固体基体进而实现冶unclassified

Direct Brazing of Al/Al$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;3$lt;/inf$gt; not Based on Wettability of Molten Metal

Chen¹,

Shi²,

Sun³

et al. 2016

Journal of Inorganic Materials

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Al 2 O 3 cannot be directly brazed with aluminum due to the poor wettability of aluminum on alumina below 850℃. Based upon effect of sputtered aluminum wetting on Al 2 O 3 , a direct brazing method was proposed to utilize sputtered Al-based films as brazing fillers on alumina. The results show that direct brazing of Al 2 O 3 by Al and Al-Cu alloy can be achieved at 680℃ in vacuum with vacuum level only of 0.1 Pa. Through this method, the shear strength of joint with pure Al as brazing filler is 115 MPa and that with Al-1.6at% Cu is up to 163 MPa. When the Cu content in the Al-Cu alloy increases to 14.3at%, the shear strength of joint decreases to 127 MPa, due to the joint fracture generating at the interface caused by the interfacial segregation of Cu. Moreover, the principle of this direct brazing method not based on wettability of molten metal is analyzed.

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“…However, the existence of chloride and fluoride retained in brazing seam had a bad effect on joint performance. 22) In order to realize direct brazing of ZrO 2 with Al solder, a method of removing Al 2 O 3 film covered on Al solder surface was proposed in this paper, which more specifically a kind of Ni/Al double layer was deposited on Al solder surface. The direct brazing of ZrO 2 with Al was successfully achieved with the increasement of brazing temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Property of ZrO<sub>2</sub> Joint Direct Brazed with Aluminum

Shang

et al. 2020

Mater. Trans.

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In order to realize direct brazing ZrO 2 with Al, a kind of sputtering Ni/Al double layer on Al solder surface was used. Results showed that ZrO 2 could directly brazed to Al solder with sputtering Ni/Al double layer without interface reaction. And then direct brazing was investigated with the change of brazing temperature. Microstructure and joint strength of brazing seam were analyzed. Results showed that joint strength of brazing seam increased from 68.6 MPa to 121.2 MPa with the increasement of brazing temperature from 680°C to 840°C, when the brazing temperature increased up to 920°C, the joint strength gradually increased to 122.6 MPa. With the joint strength enhancement of brazing seam, the fracture of the joint is gradually transferred from interface to the brazing seam.

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Ultrasonic-assisted brazing of sapphire with high strength Al–4.5Cu–1.5Mg alloy

Cited by 33 publications

References 23 publications

Structure Investigation of Titanium Metallization Coating Deposited onto AlN Ceramics Substrate by Means of Friction Surfacing Process

Structure Investigation of Titanium Metallization Coating Deposited onto AlN Ceramics Substrate by Means of Friction Surfacing Process

Direct Brazing of Al/Al$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;3$lt;/inf$gt; not Based on Wettability of Molten Metal

Microstructure and Property of ZrO<sub>2</sub> Joint Direct Brazed with Aluminum

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