CAJ | 학술논문

高能球磨技术作为一种制备包括纳米粉体在内的多种亚稳相材料的有效方法,已获得广泛应用.通常可以添加过程处理剂或在低温下球磨来抑制球磨过程中的冷焊,促使粉末细化.利用外加物理能场辅助高能球磨,使物理能与机械能协同作用到粉末,也是提高高能球磨效率的一种有效途径.根据不同条件下Fe粉的球磨细化结果,分析了高能球磨中过程处理剂、低温和外加能场辅助等主要促进粉体细化的因素及其作用.研究表明,采用等离子体辅助球磨仅仅10h,铁粉颗粒就被细化到了100nm.这种高的细化效率是因为等离子体辅助球磨中,等离子体对粉体产生的热爆效应和热应力的协同作用使粉体更易细化.
고능구마기술작위일충제비포괄납미분체재내적다충아은상재료적유효방법,이획득엄범응용.통상가이첨가과정처리제혹재저온하구마래억제구마과정중적랭한,촉사분말세화.이용외가물리능장보조고능구마,사물리능여궤계능협동작용도분말,야시제고고능구마효솔적일충유효도경.근거불동조건하Fe분적구마세화결과,분석료고능구마중과정처리제、저온화외가능장보조등주요촉진분체세화적인소급기작용.연구표명,채용등리자체보조구마부부10h,철분과립취피세화도료100nm.저충고적세화효솔시인위등리자체보조구마중,등리자체대분체산생적열폭효응화열응력적협동작용사분체경역세화.
High-energy ball milling is an effective process to synthesize various materials with non-equilibrium microstructure including nano-powder and has been applied extensively. In order to limit cold welding and promote powder refining, process control agent or cryomilling is used. It is also an effective way to accelerate ball milling using external physics energy fields as assistant which can act on the powders cooperating with mechanical energy. Based on the results of Fe powder refining, the main promotion factors of powder refinement in high-energy ball milling are studied, such as process control agent, low temperature and external energy fields. Only 10h is required for Fe particles to reach 100nm by plasma-assisted ball milling. The high efficiency of refinement is resulting from the hot explosion effect and thermal stress brought up by the plasma during assisted ball milling.