| Ni、Cu-Al2O3纳米金属陶瓷粉末的热压 |
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| 引用本文： | 范景莲,刘勋,黄伯云,凌国良,刘涛.Ni、Cu-Al2O3纳米金属陶瓷粉末的热压[J].粉末冶金技术,2005,23(2):120-124. |
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| 作者姓名： | 范景莲 刘勋 黄伯云 凌国良 刘涛 |
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| 作者单位： | 1. 中南大学粉末冶金国家重点实验室,长沙,410083
2. 宁波凌日表面有限公司,宁波,315800 |
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| 摘 要： | 将化学电镀法制备的纳米Ni、Cu包覆Al2O3粉末进行热压。研究了金属Ni、Cu及其含量对Al2O3粉末的烧结致密化、显微组织和性能的影响。在纳米Al2O3粉末表面镀覆适当的金属Ni、Cu可以较有效地提高致密化，降低烧结温度。金属相作为第二相可以大大细化Al2O3晶粒组织。但Ni、Cu的加入伴随着Al2O3硬度和强度下降。硬度变化可以由金属Ni、Cu是软相较好地解释。强度下降则主要归因于包覆粉末中Ni、Cu对Al2O3粉末的润湿性不好所致。
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| 关 键 词： | 纳米粉末 金属陶瓷 热压 |
| 修稿时间： | 2003年9月1日 |
Hot pressing of Ni-Al2O3/Cu-Al2O3 cermet nanopowder |
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| Fan Jinglian,Liu Jun,Huang Baiyun,Ling Guoliang,Liu Tao.Hot pressing of Ni-Al2O3/Cu-Al2O3 cermet nanopowder[J].Powder Metallurgy Technology,2005,23(2):120-124. |
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| Authors: | Fan Jinglian Liu Jun Huang Baiyun Ling Guoliang Liu Tao |
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| Abstract: | Al 2O 3 nanopowder chemically coated with Ni and Cu was hot-pressed. The influences of Ni/Cu contents on densification,microstructure and properties were studied. Proper content of Ni/Cu coated on the Al 2O 3 nanopowder can enhance densification effectively,and thus sintered temperature is decreased. The metal phase as a second phase can greatly decrease Al 2O 3 grain size,but hardness and strength are decreased too. The decrease of hardness is due to the effect of soft metal phase of Ni/Cu.The decrease of strength is attributed to the weak bonding force of Ni/Cu to Al 2O 3 powders. |
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| Keywords: | nanopowder cermet hot pressing |
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