材料期刊网

INFLUENCE OF RARE EARTH ON INTERGRANULAR CRACKING OF 9% Ni CAST STEEL

ZHANG Wei LI Longsheng CHENG Ji Dalian University of Technology , Dalian , China Lecturer , Dept.of Materials Engineering , Dalian University of Technology , Dalian 116023 , China

金属学报(英文版)

The intergranular cracking of 9% Ni cast steel seems mainly to relate to the segregation of contaminates H,S and P along boundaries.An addition of rare earth may eliminate the seg- regation of these contaminates along grain boundaries and improve the binding force among boundaries,so as to reduce remarkably the intergranular cracking.

关键词: 9%Ni cast steel , null , null

Catalysis on nano-carbon materials: Going where to? Preface

Catalysis Today

This contribution to the special issue of Catalysis Today is dedicated to selected contributions presented at the Carbocat-IV (Carbon for Catalysis) Symposium held in Dalian (China) on November 7-10 (2010). The introduction first shortly overviews the main reasons for the interest on carbon materials for catalysis and the elements of novelty discussed on the contributions of this issue, and then provide a concise outline of the general trends and developments in this field to give a glimpse on the progresses in the field, and on the perspectives of this exciting area of catalysis. (C) 2012 Elsevier B. V. All rights reserved.

关键词: Nano-carbon;Catalysis on carbon;Nanostructured carbon-based materials;Carbon hierarchy;ordered mesoporous carbon;metal-free;nanostructured carbon;activated;carbon;oxidative dehydrogenation;heterogeneous catalysis;sustainable;energy;counter electrode;porous carbons;fuel-cells