Recycling process of WC-Co cermets by hydrothermal treatment
Recycling process of WC-Co cermets by hydrothermal treatment
复制标题
DOI：
10.1007/s10853-005-4407-0
复制
发表时间：
2005-10-01
影响因子：
4.5
通讯作者：
Itoh, H
中科院分区：
文献类型：
--
作者：
Kojima, T;Shimizu, T;Itoh, H
研究了从WC-Co金属陶瓷中水热提取Co粘结相的工艺，以建立WC-Co金属陶瓷废料的新型回收体系。当金属陶瓷切屑在110℃以上的盐酸中进行水热处理时，钴结合相被有效地提取出来，金属陶瓷切屑被分解成相对较大的碎片。经水热处理后，WC烧结体变得非常脆，容易被球磨粉碎，得到的WC颗粒的平均粒度与原始WC颗粒的尺寸相近。回收的WC粉比未回收的WC粉更容易发生氧化，从而使回收的WC-Co金属陶瓷的力学性能下降。然而，只有更仔细地干燥WC粉末，才能防止力学性能的退化。这种水热工艺将成为WC-Co金属陶瓷的回收系统之一。(C)2005年Springer Science+Business Media，Inc.
Hydrothermal extraction process of Co binder phase from WC-Co cermet was investigated in order to establish a novel recycling system of WC-Co cermet scraps. When the cermet chips were hydrothermal-treated in hydrochloric acid above 110 degrees C, Co binding phase was efficiently extracted and the cermet chips were disintegrated into relatively large fragments. After hydrothermal treatment, WC sintered body become very brittle and pulverized easily by ball milling and the mean particle size of thus obtained WC particle became similar to that of virginal WC particle. The recycled WC powder was a little easier to undergo oxidation than the virginal WC powder, so that the mechanical properties of recycled WC-Co cermets were degraded. However, the degradation of mechanical properties was prevented only by drying the WC powder more carefully. This hydrothermal process will be one of the recycling systems for WC-Co cermets. (c) 2005 Springer Science + Business Media, Inc.