%0 Journal Article
%T Development of Novel Binder for Hardmetal Powder Extrusion Molding
%A Jicheng ZHOU
%A Baiyun HUANG
%A <br>JichengZHOU
%A BaiyunHUANG
%J 材料科学技术学报
%D 2002
%I 
%X A novel binder system for hardmetal powder extrusion moulding (PEM) process has been developed. The binder system comprises a major fraction of a mixture of low molecular weight components (LMWCs) and a minor fraction of very finely dispersed polymer. The feedstocks are mixed as a thick slurry at a suitable temperature and are rapidly homogenized by stirring at an adequate shear force. The binders are removed by thermal debinding. The thermal debinding mechanism has been investigated by thermogravimetry (TG) and differential thermogravimetry (DTG). At the first stage of debinding, the LMWCs are removed. These open up pore channels which allows much faster removal of the remaining polymer component during the subsequent stage. The microstructures of the moulded green parts were observed by scanning electron microscopy (SEM). The debound samples were sintered at different temperatures, and the sintered samples properties were measured.
%K Binder
%K Thermal debinding
%K Hardmetal powder extrusion moulding<br>粉末挤压成型
%K 模具
%K 粉末冶金
%K 扫描电子显微镜
%K PEM
%K SEM
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=34FEF98F5BF1CAB7BDCEB64E0FDF6093&yid=C3ACC247184A22C1&vid=13553B2D12F347E8&iid=B31275AF3241DB2D&sid=1FA4E9C3E6E88FC8&eid=F16C0F639D87527E&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=0