Al含量对TiAlN涂层的组织和抗氧化性能的影响

上海金属, 2010, 32(3): 11-14. doi: 10.3969/j.issn.1001-7208.2010.03.003

Al含量对TiAlN涂层的组织和抗氧化性能的影响

陈佳荣 ^1, , 朱丽慧 ^2, , 倪旺阳 ^3, , 刘一雄 ^4,

1.上海大学上海市现代冶金及材料制备重点实验室,上海,200072

2.上海大学上海市现代冶金及材料制备重点实验室,上海,200072

3.美国宾夕法尼亚州 Kennametal Inc.

4.美国宾夕法尼亚州 Kennametal Inc.

关键词： (Ti1-xAlx)N涂层 , Al含量 , 组织结构 , 抗氧化性

EFFECT OF Al CONTENT ON MICROSTRUCTURE AND OXIDATION RESISTANCE OF TiAlN COATINGS

采用阴极电弧蒸发镀在WC-Co硬质合金基体表面沉积两种不同Al含量的(Ti1-xAlx)N涂层,比较了(Ti0.4Al0.6)N涂层和(Ti0.55Al0.45)N涂层的组织和抗氧化性能.结果表明:两种涂层的主要相都是呈NaCl型面心立方结构的TiN.(Ti0.4Al0.6)N涂层晶格常数较小,固溶强化作用较大,具有较高的硬度.与(Ti0.55Al0.45)N涂层相比,(Ti0.4Al0.6)N涂层900 ℃氧化后增重较少.XRD和SEM分析结果表明氧化后TiMN涂层会形成Al2>O3>和TiO2>氧化物,且Al2>O3>对涂层中TiO2>析出有抑制作用,氧化后Al含量较高的(Ti0.4Al0.6)N涂层的Al2>O3>和TiO2>含量较低,表面的氧化物颗粒尺寸也较小.(Ti0.4Al0.6)N涂层抗氧化性能优于(Ti0.55Al0.45)N涂层.

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