Diffusion welding of SiC Fiber-reinforced Aluminum- base Alloy Composite

SiC纤维增强铝基合金复合材料的扩散焊接

• 批准号: 60550520
• 负责人: MOMONO Tadashi
• 金额: $ 1.22万
• 依托单位: Muroran Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550520/
• 关键词: Diffusion Welding; Diffusion Bonding; Insert-metal; Electrolytic Polishing; FRM; 複合材料; SiC繊維

An investigation has been made of the diffusion welding of SiC fiber-reinforced aluminum-base alloy composite which is very difficult to join by the conventional fusion-welding technique. The welding was made using Al-Cu-Mg series alloy (2017, 2024 alloy) and Al-5%Ca alloy as insert-metals at 540゜C to 630゜C in 1x <10^(-4)> Torr. The rapidly cooled Al-5%Ca alloy foil, 10 mm in width and 40-50 <mu> m thick, were produced by liquid quenching. From the experiment, the following results are obtained.(1) A higher bond strength for the Al-Al weldment is obtained by using electrolytic polishing.(2) The projection of SiC fiber on the welding surface is caused by the electrolytic polishing. The projecting fibers play an important role in improvement of tensile and bend strength of the joint.(3) Diffusion welding of Al to FRM using 2017 and 2024 alloy foils have been caried out in the temperature range above the solidus line where solid and liquid phases coexist. The maximum tensile strength was obtained when the volume fraction of the liquid phase was 1-5%.(4) The weldments made with Al-5%Ca alloy foil at the welding temperature of 630゜C for 180 min have the maximum tensile strength. This is attributable to acceleration of the interface reaction between SiC fiber and Al matrix by Ca.

对传统熔焊技术很难连接的SiC纤维增强铝基合金复合材料的扩散焊接进行了研究。焊接采用Al-Cu-Mg系列合金（2017、2024合金）。 ) 和 Al-5%Ca 合金作为插入金属，温度为 540°C 至 630°C，温度为 1x <10^(-4)> Torr。采用液体淬火方法制备了宽度为10mm、厚度为40-50μm的冷却Al-5%Ca合金箔。通过实验，得到了以下结果。(1)Al-5%Ca合金箔具有较高的结合强度。铝焊件采用电解抛光的方法获得。(2)焊接表面SiC纤维的突出是由于电解抛光造成的，突出的纤维对于提高焊接件的拉伸强度和弯曲强度具有重要作用。 (3)采用2017和2024合金箔进行Al与FRM的扩散焊接，在固相线以上固相和液相共存的温度范围内进行，当液相的体积分数达到最大时，获得了最大抗拉强度。 (4)Al-5%Ca合金箔焊件在焊接温度630℃、焊接180min时具有最大拉伸强度。这是由于 Ca 加速了 SiC 纤维和 Al 基体之间的界面反应。

项目成果

Tadashi MOMONO: "Diffusion Welding of SiC/Al Fiber-reinforced Composite" Journal of Japan Institute of Light Metals.

Tadashi MOMONO：《SiC/Al纤维增强复合材料的扩散焊接》日本轻金属学会杂志。

桃野正: 軽金属.

桃野正：轻金属。

Tadashi MOMONO: "Diffusion welding of SiC/Al Fiber-reinforced Composite with Various Insert-metals" Journal of Japan Institute of Light Metals.

Tadashi MOMONO：“SiC/Al 纤维增强复合材料与各种插入金属的扩散焊接”日本轻金属研究所杂志。