Direct Brazing of Al/Al2O3 without Wettability of Molten Metal

doi:10.15541/jim20150497

Abstract

Abstract:

Al₂O₃cannot be directly brazed with aluminum due to the poor wettability of aluminum on alumina below 850℃. Based upon effect of sputtered aluminum wetting on Al₂O₃, a direct brazing method was proposed to utilize sputtered Al-based films as brazing fillers on alumina. The results show that direct brazing of Al₂O₃by 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.

Key words: brazing, wettability, alumina, joint strength, aluminum alloy

CLC Number:

TQ174
TG454

CHEN Fan, SHI Kai-Cheng, SUN Shi-Yang, ZHAO Bo-Wen, SHANG Hai-Long, LI Ge-Yang. Direct Brazing of Al/Al₂O₃ without Wettability of Molten Metal[J]. Journal of Inorganic Materials, 2016, 31(6): 602-606.

Figures/Tables 4

Fig. 1 Shear strength of the brazing joints with filler metals containing various Cu contents

Fig. 2 SEM images of the brazing joints with different Cu content fillers. (a) Pure Al; (b) Al-1.6at% Cu; (c) Al-14.3at% Cu; and (d) Cu X-ray map corresponding to area of (c)

Fig. 3 Shear fracture morphologies of the brazing joints with different brazing fillers through optical microscope with a large depth of field. (a) Pure Al; (b) Al-1.6at% Cu; (c) Al-14.3at% Cu

Fig. 4 Three-dimensional morphologies of Al films after melting through optical microscope with a large depth of field. (a) Al2O3/ Cu(50 nm)/Al(7 μm) sample; (b) Al2O3/Al(50 nm)/Cu (50 nm)/Al(7 μm) sample

References 24

[1]	CUI W, YAN J, DAI Y, et al.Building a nano-crystalline α-alumina layer at a liquid metal/sapphire interface by ultrasound. Ultrason. Sonochem., 2015, 22: 108-112.
[2]	ALI M, KNOWLES K M, MALLINSON P M, et al.Microstructural evolution and characterization of interfacial phases in Al2O3/ Ag-Cu-Ti/Al2O3 braze joints.Acta Mater., 2015, 96: 143-158.
[3]	YADAV D P, KAUL R, GANESH P, et al.Study on vacuum brazing of high purity alumina for application in proton synchrotron.Mater. Des., 2014, 64: 415-422.
[4]	JASIM K M, HASHIM F A, YOUSIF R H, et al.Actively brazed alumina to alumina joints using CuTi, CuZr and eutectic AgCuTi filler alloys.Ceram. Intl., 2010, 36(8): 2287-2295.
[5]	LAIK A, MISHRA P, BHANUMURTHY K, et al.Microstructural evolution during reactive brazing of alumina to Inconel 600 using Ag-based alloy.Acta Mater., 2013, 61(1): 126-138.
[6]	XIA H, WU A, FAN Y, et al.Effects of ion implantation on the brazing properties of high purity alumina.Surf. Coat. Technol., 2012, 206(8): 2098-2104.
[7]	GHOSH S, CHAKRABORTY R, DANDAPAT N, et al.Characterization of alumina-alumina/graphite/monel superalloy brazed joints.Ceram. Int., 2012, 38(1): 663-670.
[8]	PIETRZAK K, OLESINSKA W, KALINSKI D, et al.The relationship between microstructure and mechanical properties of directly bonded copper-alumina ceramics joints.Bull. Pol. Acad. Sci., 2014, 62(1): 23-32.
	FU W, SONG X G, HU S P, et al.Brazing copper and alumina metallized with Ti-containing Sn0.3Ag0.7Cu metal powder.Mater. Des., 2015, 87: 579-585.
[9]	LOVRO G, BLUGAN G, BORETIUS M, et al.Fracture behavior of soldered Al2O3 ceramic to A356 aluminum alloy and resistance of the joint to low temperature exposure.Mater. Des., 2015, 88: 889-896.
[10]	LEINENBACH C, WEYRICH N, ELSENER H R, et al.Al2O3-Al2O3 and Al2O3-Ti solder joints-influence of ceramic metallization and thermal pretreatment on joint properties.Int. J. Appl. Ceram. Tec., 2012, 9(4): 751-763.
[11]	KSIAZEK M, SOBCZAK N, MIKULOWSKI B, et al.Wetting and bonding strength in Al/Al2O3 system.Mater. Sci. Eng., A, 2002, 324(1): 162-167.
[12]	SANGGHALEH A, HALALI M.An investigation on the wetting of polycrystalline alumina by aluminium.J. Mater. Process. Technol., 2008, 197(1): 156-160.
[13]	LEE S B, KIM Y M.Direct observation of in-plane ordering in the liquid at a liquid Al/alpha-Al2O3 (<inline-graphic xlink:href="1000-324X-31-6-602/img_5.wmf"/>) interface.Acta Mater., 2011. 59(4): 1383-1388.
[14]	YU Z Q, WU G H, SUN D L, et al.Coating of Y2O3 additive on Al2O3 powder and its effect on the wetting behaviour in the system Al2O3p/Al.Mater. Lett., 2003, 57(20): 3111-3116.
[15]	SANGGHALEH A, HALALI M.Effect of magnesium addition on the wetting of alumina by aluminium.Appl. Surf. Sci., 2009, 255(19): 8202-8206.
[16]	CUI W, LI S, YAN J, et al.Ultrasonic-assisted brazing of sapphire with high strength Al-4.5Cu-1.5Mg alloy.Ceram. Intl., 2015, 41(6): 8014-8022.
[17]	PILANIA G, THIJSSE B J, HOAGLAND R G, et al.Revisiting the Al/Al2O3 interface: coherent interfaces and misfit accommodation.Sci. Rep., 2014, 4: 1-9.
[18]	ZHANG W, SMITH J R.Nonstoichiometric interfaces and Al2O3 adhesion with Al and Ag.Phys. Rev. Lett., 2000, 85(15): 3225-3228.
[19]	ZHANG Q, CAGIN T, VAN D A, et al. Adhesion and nonwetting -wetting transition in the Al/alpha-Al2O3 interface. Phys. Rev. B, 2004, 69(4): 45423-1-45423-11.
[20]	WANG B, NING X S, LI S.A new process for bonding Al to Al2O3 Ceramics.Rare. Met. Mater. Eng., 2011, 40(22): 518-521.
[21]	LI S, NING X S, WANG B.Study on dip-coating of Al2O3 ceramics with Al.Rare. Met. Mater. Eng., 2011, 40(22): 525-528.
[22]	PENG R, ZHOU H P, NING X S, et al.Research of the performance of Al/Al2O3 substrate substrates.Journal of Inorganic Materials, 2012, 17(4): 731-736.
[23]	郑伟涛. 薄膜材料与薄膜技术. 北京: 化学工业出版社, 2004: 72.
[24]	FUJII H, NAKAE H, OKADA K.Interfacial reaction wetting in the boron nitride/molten aluminum system.Acta metall. mater., 1993, 41(10): 2963-2971.

Direct Brazing of Al/Al₂O₃ without Wettability of Molten Metal

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