2陶瓷;GH3536合金;復(fù)合釬料;高溫氧化"/> 2TiO5顆粒增強(qiáng)的Ag-CuO-Al2TiO5復(fù)合釬料,在釬焊溫度為1050 ℃保溫30 min工藝參數(shù)下,對(duì)ZrO2陶瓷與GH3536合金進(jìn)行了空氣反應(yīng)釬焊(RAB),分析了釬焊接頭的界面結(jié)構(gòu)及其形成機(jī)制；同時(shí)研究了接頭在800 ℃氧化不同時(shí)間的組織演變規(guī)律及其對(duì)連接性能的影響。結(jié)果表明,釬焊過程中Al2TiO5顆粒分解產(chǎn)生Al2O3和TiO2,TiO2與ZrO2陶瓷反應(yīng)生成ZrTiO4相。GH3536側(cè)金屬元素發(fā)生氧化形成尖晶石層,并分別與釬縫中的Al2O3、CuO反應(yīng),在釬縫中生成細(xì)密分布的NiAl2O4相及緊鄰尖晶石層的團(tuán)塊狀NiCuO2相。ZrO2/GH3536接頭高溫氧化1000 h后,釬縫中NiAl2O4呈團(tuán)塊狀分布,Cr2O3薄層保持穩(wěn)定；尖晶石層內(nèi)部元素均勻化,厚度有明顯增加。接頭強(qiáng)度隨著氧化時(shí)間的延長先降低后穩(wěn)定在20 MPa。"/>

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空氣反應(yīng)釬焊ZrO2與GH3536接頭組織與力學(xué)性能
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1.天津大學(xué) 天津市現(xiàn)代連接重點(diǎn)實(shí)驗(yàn)室;2.合肥工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院

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國家自然科學(xué)基金資助(項(xiàng)目號(hào)：51875400)


Interfacial Microstructure and Properties of ZrO2 Ceramic and GH3536 Alloy Reactive Air Brazed Joints
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1.Tianjin Key Lab of Advanced Joining Technology,Tianjin University;2.School of Materials Science and Engineering,Hefei University of Technology

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    摘要:

    采用Al2TiO5顆粒增強(qiáng)的Ag-CuO-Al2TiO5復(fù)合釬料,在釬焊溫度為1050 ℃保溫30 min工藝參數(shù)下,對(duì)ZrO2陶瓷與GH3536合金進(jìn)行了空氣反應(yīng)釬焊(RAB),分析了釬焊接頭的界面結(jié)構(gòu)及其形成機(jī)制；同時(shí)研究了接頭在800 ℃氧化不同時(shí)間的組織演變規(guī)律及其對(duì)連接性能的影響。結(jié)果表明,釬焊過程中Al2TiO5顆粒分解產(chǎn)生Al2O3和TiO2,TiO2與ZrO2陶瓷反應(yīng)生成ZrTiO4相。GH3536側(cè)金屬元素發(fā)生氧化形成尖晶石層,并分別與釬縫中的Al2O3、CuO反應(yīng),在釬縫中生成細(xì)密分布的NiAl2O4相及緊鄰尖晶石層的團(tuán)塊狀NiCuO2相。ZrO2/GH3536接頭高溫氧化1000 h后,釬縫中NiAl2O4呈團(tuán)塊狀分布,Cr2O3薄層保持穩(wěn)定；尖晶石層內(nèi)部元素均勻化,厚度有明顯增加。接頭強(qiáng)度隨著氧化時(shí)間的延長先降低后穩(wěn)定在20 MPa。

    Abstract:

    ZrO2 ceramic and GH3536 alloy were successfully reactive air brazed (RAB) at 1050℃ for 30min with Ag-CuO-Al2TiO5 composite filler. The interface structure and formation mechanism of the brazing joint were analyzed. Meanwhile, the influence of the exposure test at 800 ℃ on the microstructure and properties of joints were systematically analyzed. The results showed that Al2TiO5 particles were decomposed into Al2O3 and TiO2 particles, and TiO2 reacted with ZrO2 ceramic to form the ZrTiO4 phase. The oxidation reaction occurred on the metal elements from GH3536, which reacted with Al2O3 and CuO in the brazing seam respectively to generate NiAl2O4 phase with fine distribution in the brazing seam and massive NiCuO2 phase adjacent to the spinel layer. After the ZrO2/GH3536 joint was oxidized above 1000 h at 800 ℃, NiAl2O4 in the brazing joint was distributed in blocks and while the thin layer of Cr2O3 remained stable. The elements inside the spinel layer were homogenized, the thickness of which increased significantly. The strength of the joint first decreased and then stabilized at 20 MPa with the extension of oxidation time.

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楊鈞皓,楊振文,王穎,宋奎晶,王東坡.空氣反應(yīng)釬焊ZrO2與GH3536接頭組織與力學(xué)性能[J].稀有金屬材料與工程,2021,50(12):4450~4456.[Yang Junhao, Yang zhenwen, Wang Ying, Song Kuijing, Wang dongpo. Interfacial Microstructure and Properties of ZrO2 Ceramic and GH3536 Alloy Reactive Air Brazed Joints[J]. Rare Metal Materials and Engineering,2021,50(12):4450~4456.]
DOI：10.12442/j. issn.1002-185X.20201008

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  • 收稿日期:2020-12-30
  • 最后修改日期:2021-01-11
  • 錄用日期:2021-02-03
  • 在線發(fā)布日期: 2022-01-09
  • 出版日期: 2021-12-24