Microsegregation of peritectic systems in a temperature gradient: Analysis in directionally solidified Sn–36at.%Ni peritectic alloy

2016 ◽  
Vol 94 ◽  
pp. 488-497 ◽  
Author(s):  
Peng Peng ◽  
Xinzhong Li ◽  
Yanqing Su ◽  
Jingjie Guo ◽  
Hengzhi Fu
Keyword(s):  
Temperature Gradient ◽  
Gradient Analysis ◽  
Directionally Solidified ◽  
Peritectic Alloy

Microstructure Formation during Unidirectionally Solidified Pb-Bi-Sn Tenary Quasi-Peritectic Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 3799-3803
Author(s):  
Xiao Wu Hu ◽  
Hong Yan
Keyword(s):  
Solid Solution ◽  
Temperature Gradient ◽  
Growth Velocity ◽  
Solution Phase ◽  
Solid Solution Phase ◽  
Directionally Solidified ◽  
Microstructure Formation ◽  
Peritectic Alloy ◽  
Constant Temperature Gradient ◽  
Α Phase

In order to investigate the microstructure formation resulted from quasi-peritectic reaction in Pb-Bi-Sn ternary alloy, specimens were directionally solidified with a constant temperature gradient (G=18 K/mm) and the growth velocities ranging from 0.5 μm/s to 10 μm/s. Experimental results indicated that a microstructure, which is composed of the residual primary α phase (Pb-rich solid solution), peritectic β-(Pb7Bi3) phase and Sn-rich solid solution phase was observed. Transition from primary α-cell to primary α-dendrite took place with the increasing growth velocity. The rod-like eutectic was observed in the inter-cellular region under low growth velocity. Detail analyses were adopted to identify the phases and determine the phase compositions, respectively.

Secondary dendrite arm migration caused by temperature gradient zone melting in the directionally solidified Sn–40 at.% Mn peritectic alloy

2013 ◽  
Vol 28 (9) ◽  
pp. 1196-1202 ◽  
Author(s):  
Peng Peng ◽  
Xinzhong Li ◽  
Dongmei Liu ◽  
Yanqing Su ◽  
Jingjie Guo ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Zone Melting ◽  
Directionally Solidified ◽  
Peritectic Alloy ◽  
Gradient Zone ◽  
Image Position

Abstract

Morphological Characteristics of W-Nanowires after Selective Etching

2014 ◽  
Vol 1004-1005 ◽  
pp. 24-27
Author(s):  
Wen Jia Wang ◽  
Zhi Long Zhao ◽  
Ming Tang ◽  
Jian Jun Gao
Keyword(s):  
Growth Rate ◽  
Temperature Gradient ◽  
Directional Solidification ◽  
Morphological Characteristics ◽  
Selective Dissolution ◽  
Stability Diagram ◽  
Selective Etching ◽  
Directionally Solidified ◽  
Solidification Furnace ◽  
Nial Matrix

An eutectic NiAl–1.5 at.% W alloy prepared by using directionally solidified (DS)was employed as a source for producing W-nanowires. Several growth rate of 8,15,25/s was respectively used at a temperature gradient of ~240 K/cm in a Bridgman-type directional solidification furnace. A combined stability diagram was applied to predict proper conditions for the selective dissolution of NiAl matrix to get W-wires. Etching in a mixture of HCl:H2O2released parallel aligned W-nanowires with a wire diameter of ~500 nm. Different morphologies, such as nanobelts, lotus-shaped, conical of W-nanowires are obtained at the different conditions.

scholarly journals On oscillatory microstructure during cellular growth of directionally solidified Sn–36at.%Ni peritectic alloy

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Peng Peng ◽  
Xinzhong Li ◽  
Jiangong Li ◽  
Yanqing Su ◽  
Jingjie Guo
Keyword(s):  
Cellular Growth ◽  
Directionally Solidified ◽  
Peritectic Alloy
Sign in / Sign up

Export Citation Format

Share Document