摘要
为了改进制备工艺和提高钨合金的性能，对原材料粉末做了机械活化和化学活化处理，通过烧结制备了钨合金，考察了经机械活化和化学活化后粉末的变化，观察了合金的组织、测试了合金的密度、硬度、抗弯强度等性能。结果表明，机械活化可以使粉末颗粒变细、比表面增大、缺陷增多；化学活化可以在粉末颗粒表面形成含微量合金元素的均匀薄层，并通过反应形成高活性层。二者都能使粉末的活性提高，对经活化处理的粉末施以烧结可以获得较高密度和性能的钨合金。
Tungsten alloys were sintered with mechanically and chemically activated powder in order to improve the preparing process and properties of the alloys. The microstructure of activated powder and sintered alloy was observed. Properties such as density, hardness and strength were measured. The results show that through mechanical activation the particle size becomes finer and the defects increase, through chemical activation a thin layer including microelements with homogeneous structure and high activity is formed on the powder partical surface. By the combination of two activation methods, tungsten alloys have higher density and properties can be obtained. This is useful for developing and producing the alloys.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第6期35-38,共4页
Journal of Tsinghua University(Science and Technology)
基金
国防科技预研基金
关键词
粉末冶金
机械活化
化学活化
钨合金
烧结
powder metallurgy
mechanical activation
chemical activation
tungsten alloys
sintering
