Development of niobium powder injection molding: Part I. Feedstock and injection molding

被引：77

作者：

Aggarwal, G ^{[1
]}

Park, SJ ^{[1
]}

Smid, I ^{[1
]}

机构：

[1] Penn State Univ, Ctr Innovat Sintered Prod, University Pk, PA 16802 USA

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2006年 / 24卷 / 03期

关键词：

powder injection molding of niobium; Nb powder and feedstock; rheological properties of niobium; shear viscosity; optimum filling time and PIM parameters; moldability index; critical solids loading;

D O I：

10.1016/j.ijrmhm.2005.06.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It has been only during the past four decades that niobium has been consumed on an industrial scale. Pure niobium and niobium base alloys constitute less than 2% of the global niobium market. Niobium being a refractory metal doesn't have a powder cost penalty as in ferrous materials, since refractory parts are formed from powders. This article details a systematical approach to develop feedstock for powder injection molding of niobium. It has been proven that powder injection molding is a viable forming technique for pure niobium. Further, rheological properties have been combined to determine optimal and critical solids loading. Based on simulation, injection temperatures and pressures were determined for optimal filling time. For the first time, a processing window has been identified based on the rheological behavior and simulation of niobium feedstock. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：253 / 262

页数：10

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