Brazing of zirconia to titanium using pure gold: Physicochemical aspects

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-10-18 DOI:10.1016/j.jeurceramsoc.2024.117000

Marie Fischer , Valérie Chaumat , Camille Flament , Fiqiri Hodaj

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Abstract

The main objective of this study is to investigate the influence of several experimental parameters on the evolution of the joint microstructure and interfaces during brazing of zirconia with titanium using pure gold foils 25–150 µm thick. The brazing experiments were carried out under high vacuum at 1080–1100°C with 3–60 minutes of holding time. Cross sections of the joints were characterized by SEM with EDX analysis, TEM and X-ray diffraction. Four intermetallics and a Ti-Au solid solution were formed at Au / Ti interface and a submicron Ti₂O₃ layer at Au / ZrO₂ interface. The interdiffusion in Au-Ti intermetallics is so fast that brazing with thin gold foils (25–50 µm) can lead to a total consumption of the liquid Au. To avoid isothermal solidification of the joint and obtain a thin and continuous Ti₂O₃ layer, low temperature, thick gold foil and short holding time are recommended for the brazing process.

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使用纯金将氧化锆钎焊到钛上：物理化学方面

本研究的主要目的是研究使用 25-150 µm 厚的纯金箔钎焊氧化锆和钛时，几个实验参数对接头微观结构和界面演变的影响。钎焊实验在 1080-1100°C 的高真空条件下进行，保温时间为 3-60 分钟。接头的横截面由带有 EDX 分析的扫描电镜、TEM 和 X 射线衍射进行表征。在金/钛界面上形成了四个金属间化合物和钛/金固溶体，在金/氧化锆界面上形成了亚微米级的 Ti2O3 层。金-钛金属间化合物的相互扩散速度非常快，以至于使用薄金箔（25-50 微米）进行钎焊会导致液态金的完全消耗。为了避免接合处的等温凝固并获得薄而连续的 Ti2O3 层，建议在钎焊过程中使用低温、厚金箔和短保温时间。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.