CAJ | 학술논문

选择硬脂酸、十八醇、十八胺、金刚烷以及它们之间的混合物作为模压候选成形剂,以润滑粉体、润滑模具和同时润滑三种方式进行润滑,系统研究了它们对TiH_2粉体成形性的影响.结果表明,单纯TiH_2粉成形性非常差,添加成形剂能够显著改善粉体的成形性能.成形剂以第一种方式加入时,单一成分的成形剂很难达到相对密度较高和保形效果较佳的要求,而混合型即十八醇中添加少量金刚烷效果较好.采用润滑模具方式比较容易获得高质量压坯、成形剂用量少、压坯密度高、外观质量好.相比而言,同时润滑方式没有表现出明显的优势.研究还发现,压制压力是能否获得优质高密度压坯的关键因素之一,合理的TiH_2粉体压制压力范围为600～700MPa.
선택경지산、십팔순、십팔알、금강완이급타문지간적혼합물작위모압후선성형제,이윤활분체、윤활모구화동시윤활삼충방식진행윤활,계통연구료타문대TiH_2분체성형성적영향.결과표명,단순TiH_2분성형성비상차,첨가성형제능구현저개선분체적성형성능.성형제이제일충방식가입시,단일성분적성형제흔난체도상대밀도교고화보형효과교가적요구,이혼합형즉십팔순중첨가소량금강완효과교호.채용윤활모구방식비교용역획득고질량압배、성형제용량소、압배밀도고、외관질량호.상비이언,동시윤활방식몰유표현출명현적우세.연구환발현,압제압력시능부획득우질고밀도압배적관건인소지일,합리적TiH_2분체압제압력범위위600～700MPa.
With Stearic acid、Octadecanol、Octadecyl amine、Adamantane and their intermixtures as candidate binders, the effect of candidate binders on the compactibility of TiH_2 powders was systematically studied and those binders were used in three ways: blending with TiH_2 powders, being coated on the surface of a pressing mold's cavity and simultaneously adopting the former two ways. The results show that though the compactibility of pure TiH_2 powders is too poor to obtain a fine compact, TiH_2 powders with binders can get better compactibility.In the first way intermixture binders show better compactibility than single one and among them a mixture of octadecanol with some of Adamantane is the best. It is revealed that in comparison with other two ways coating a binder on the surface of a pressing mold's cavity not only notably reduces binder dosage, but also insure to get a high quality green compact with higher relative density and better surface quality, but the third way shows little obvious advantage. Moreover, it is also found that pressing force plays a key role in fabricating a compact with high density and good geometry quality and a reasonable pressing force for TiH_2 powders is between 600-700MPa.