The Thermal Relaxation Effect in The Bending Joints Between Metal and Alumina With A Modified Macrogeometry of The Alumina Surface To Be Joined.

金属和氧化铝之间弯曲接头的热松弛效应，以及待连接的氧化铝表面的宏观几何形状的修改。

• 批准号: 10555258
• 负责人: SHINOZAKI Kenji
• 金额: $ 3.58万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555258/
• 关键词: centrifugal compaction; alumina; brazing; surface macrogeometry; joint strength; boundary shape; 高速遠心形成法; 反応層

The effect of a modified macrogeometry of alumina surface to be joined on the performance of Alumina / Metal joints was investigated. High strength alumina with various surface macrogeometry were prepared by centrifugal net-shape compacting process, and were joined with SUS304 stainless steel, KOVAR and HT80 using Ag-27.5mass%Cu-2.0mass%Ti brazing filler metal at 1113 K for 0.6 ks. The microstructure and reaction layer of the joints were investigated by SEM and EDX. The thermal stresses around the joints were calculated by FEM analysis and the reduction of critical stress by changing surface macrogeometry of alumina were estimated.The results of the study obtained are as follows.1. In the case of plane macrogeometry of alurnina, alumina can be joined to KOVAR and HT80 without cracks, whereas many cracks observed in alumina / SUS304 joint.2. Three phases are commonly observed at the boundary of each joint regardless of metal types. Those are Ti rich layer, Ag-Cu eutectic, and a intermetallic phase (CuィイD23ィエD2Ti, AlTi, or AlィイD23ィエD2Ti).3. Alumina / KOVAR joint shows four-point bending strength of 270 MPa. The crack propagates in Ti rich layer, that is, the whole strength of the joint is determined principally by the strength of the Ti rich layer.4. FEM thermal stresses analyses show that surface macrogeometry of alumina has no positive effect on alumina / KOVAR joint, but it reduces the stress of 20 MPa on alumina / SUS304 joint. The alumina / SUS304 joints with variovs surface macrogeometry of alumina, however, show some cracks. It is considered that the quantity of stress relaxation is not sufficient for alumina / SUS304 joint.

研究了氧化铝表面宏观几何形状的改变对氧化铝/金属接头性能的影响。采用离心净成形工艺制备了不同表面宏观形貌的高强度氧化铝陶瓷，并采用Ag-27.5mass%Cu-2.0mass%Ti钎料在1113 K、0.6 ks温度下与SUS 304不锈钢、KOVAR和HT 80进行了连接。采用扫描电子显微镜（SEM）和能谱仪（EDX）对接头的微观组织和反应层进行了研究。通过有限元分析，计算了接头附近的热应力，并估算了改变氧化铝表面宏观几何形状对临界应力的降低程度.在Al_2O_3/Al_2O_3/SUS 304接头中观察到大量裂纹，而在Al_2O_3/KOVAR和HT 80接头中观察到大量裂纹.无论金属类型如何，通常在每个接头的边界处观察到三相。这些是富Ti层、Ag-Cu共晶和金属间化合物相（Cu Al 2 O3 D23 Al 2 O3 D2 Ti、AlTi或Al Al 2 O3 D23 Al 2 O3 D2 Ti）。氧化铝/ KOVAR接头的四点弯曲强度为270 MPa。裂纹在富钛层中扩展，即接头的整体强度主要由富钛层的强度决定.有限元热应力分析表明，氧化铝表面宏观几何形状对氧化铝/ KOVAR接头无明显影响，但可使氧化铝/SUS 304接头的热应力降低20 MPa。然而，具有不同表面形貌的氧化铝/SUS 304接头却出现了裂纹。认为氧化铝/SUS 304接头的应力松弛量不足。

项目成果

篠崎賢二: "Cu薄膜接合+低温放電プラズマ加熱接合法によるAl_2O_3/SUS304の接合セラミックスの応力緩和接合法の研究(第2報)-"溶接学会全国大会講演概要. 61. 220-221 (1997)

Kenji Shinozaki：《采用Cu薄膜接合+低温放电等离子体加热接合法的接合Al_2O_3/SUS304陶瓷的应力松弛接合方法的研究（第2次报告）——》日本焊接学会全国会议演讲摘要。 61. 220-221（1997）

Kenji Mega: "Relaxation of Residual Stress of the Joint Using Controlling the Shape of Bonded Interface - Bonding of Al2O3 made by High-speed Centrifugal Compaction to Metal (part 2) -"Preprints of the National Meeting of J. W. S.. 60. 26-27 (1997)

Kenji Mega：“通过控制接合界面的形状来松弛接头的残余应力 - 通过高速离心压实制成的 Al2O3 与金属的接合（第 2 部分）-”J. W. S. 全国会议预印本 60. 26-27

K. Shinozaki: "Bonding Al2O3 to SUS304 by Discharged Plasma Heating with Cu Powder Thin Sheet Brazing -Study on Residual Stress Relief of Ceramic-Metal Joint (Report 2) -"Preprints of the National Meeting of J. W. S.. 61. 220-221 (1997)

K. Shinozaki：“通过放电等离子加热与铜粉薄板钎焊将 Al2O3 与 SUS304 结合 - 陶瓷-金属接头残余应力消除的研究（报告 2） -” J. W. S. 全国会议预印本 61. 220-221（

妻鹿賢嗣: "接合継手の機械的性質-高速遠心成形アルミナと金属との接合(第1報)"溶接学会全国大会講演概要. 59. 176-177 (1996)

Kenji Tsumaka：“接头的机械性能 - 将高速离心成型的氧化铝连接到金属（第一份报告）” 日本焊接学会全国会议上的演讲摘要 59. 176-177 (1996)。

Y. Fukaya: "Bonding Al2O3 to SUS304 by Diffusion Bonding at Low Temperature after Ag Thin Sheet Brazing - Study on Residual Stress Relief of Ceramic-Metal Joint (Report 1) -"Preprints of the National Meeting of J. W. S.. 61. 218-219 (1997)

Y. Fukaya：“Ag薄板钎焊后低温扩散结合将Al2O3与SUS304结合-陶瓷-金属接头残余应力消除的研究（报告1）-”J. W. S.全国会议预印本61. 218-219