Effect of pore sizes on the microstructure and properties of the biomedical porous NiTi alloys prepared by microwave sintering

2015 ◽  
Vol 645 ◽  
pp. 137-142 ◽  
Author(s):  
J.L. Xu ◽  
L.Z. Bao ◽  
A.H. Liu ◽  
X.F. Jin ◽  
J.M. Luo ◽  
...  
Keyword(s):  
Microwave Sintering ◽  
Microstructure And Properties ◽  
Niti Alloys ◽  
Pore Sizes ◽  
Porous Niti

Effect of NH4HCO3 Contents on the Microstructure of the Microwave Sintered Porous NiTi Alloys

2014 ◽  
Vol 496-500 ◽  
pp. 264-267
Author(s):  
Ji Lin Xu ◽  
Xiao Fei Jin ◽  
Jun Ming Luo ◽  
Ai Hui Liu
Keyword(s):  
Surface Roughness ◽  
Pore Size ◽  
Optical Microscopy ◽  
Microwave Sintering ◽  
X Ray Diffraction ◽  
X Ray ◽  
Niti Alloys ◽  
Porous Niti ◽  
Diffraction Peaks

In this paper, the porous NiTi alloys were prepared by microwave sintering, and the effects of NH4HCO3contents on the microstructure of the porous NiTi alloys were studied. The microstructure of the porous NiTi alloys was investigated by optical microscopy, Archimedes drainage method, surface roughmeter and X-ray diffraction. The results showed that the porous NiTi alloys were mainly composed of NiTi, Ni3Ti, Ti2Ni and Ni, and the diffraction peaks of the non-equiatomic phases (Ni3Ti, Ti2Ni and Ni) increased with increasing the NH4HCO3contents. At the same time, the porosity, pore size and surface roughness of the porous NiTi alloys increased with the increase of the NH4HCO3contents.

scholarly journals Preparation and characterization of porous NiTi alloys synthesized by microwave sintering using Mg space holder

2021 ◽  
Vol 31 (2) ◽  
pp. 485-498
Author(s):  
Tao LAI ◽  
Ji-lin XU ◽  
Qi-fei XIAO ◽  
Yun-xiang TONG ◽  
Jun HUANG ◽  
...  
Keyword(s):  
Microwave Sintering ◽  
Space Holder ◽  
Niti Alloys ◽  
Porous Niti

scholarly journals Microstructure and properties of the Nd2Fe14Bp/Al–Co composites fabricated via microwave sintering

2021 ◽  
Vol 10 ◽  
pp. 34-50
Author(s):  
G.R. Li ◽  
J.J. Chen ◽  
D. Zhang ◽  
H.M. Wang ◽  
M. Liu ◽  
...  
Keyword(s):  
Microwave Sintering ◽  
Microstructure And Properties

Study on Effect of Sintering Temperature on Microstructure and Compressive Property of Porous NiTi Alloys

2011 ◽  
Vol 299-300 ◽  
pp. 480-483 ◽  
Author(s):  
Jing Yuan Yu ◽  
Qiang Li
Keyword(s):  
Compressive Strength ◽  
Phase Composition ◽  
Sintering Temperature ◽  
Testing Machine ◽  
Compressive Property ◽  
Powder Metallurgy Method ◽  
Niti Alloys ◽  
Porous Niti ◽  
Universal Testing ◽  
Niti Phase

Porous NiTi alloys were prepared by powder metallurgy method using NH4HCO3as space-holder. The effect of sintering temperature on pore characteristic, phase composition and compressive property of porous NiTi alloys was studied by XRD, SEM, EDS and a universal testing machine. The results show with the increase of sintering temperature the porosity of porous NiTi alloys first increases and then decreases, but the content of NiTi phase, compressive strength and modulous of sintered products continuously increase. When sintered at 980°C for 2h, the porous NiTi alloys have higher porosity of 53.6%, better compressive strength of 173.7MPa and elastic modulous of 4.2GPa. The phases of sinter products are mainly composed by TiNi, Ti2Ni, and TiNi3phases.

Porous NiTi alloys produced by press-and-sinter from Ni/Ti and Ni/TiH2 mixtures

2013 ◽  
Vol 582 ◽  
pp. 117-125 ◽  
Author(s):  
Gang Chen ◽  
Peng Cao ◽  
Neil Edmonds
Keyword(s):  
Niti Alloys ◽  
Porous Niti

scholarly journals Effect of La2O3on microstructure and properties of Cu20Fe80alloy by microwave sintering

2017 ◽  
Vol 207 ◽  
pp. 012014
Author(s):  
Junwei Fu ◽  
Suhua Yin ◽  
Zhongqi Dong ◽  
Yang Wang ◽  
Yanxia Liu
Keyword(s):  
Microwave Sintering ◽  
Microstructure And Properties

Study on Preparation and Anodic Oxidation of Gradient Porous NiTi Alloy

2012 ◽  
Vol 430-432 ◽  
pp. 1373-1377
Author(s):  
Qiang Li ◽  
Jing Yuan Yu ◽  
Xu Dong Sun
Keyword(s):  
Anodic Oxidation ◽  
Niti Alloy ◽  
Surface Film ◽  
Powder Metallurgy Method ◽  
Release Behavior ◽  
Ion Release ◽  
Gradient Distribution ◽  
Niti Alloys ◽  
Porous Niti ◽  
Oxidation Technology

Gradient porous NiTi alloys were prepared by powder metallurgy method using NH4HCO3 as space-holder and modified by direct current-pulse anodic oxidation technology in low temperature. Pore characteristic and phase composition of gradient porous NiTi alloys were studied. Microstructure, composition, anti-corrosion and Ni ion release behavior of surface film were observed. The results show the porosity of porous NiTi alloys decreases from 53.2% to 42.8%, when the content of NH4HCO3 varying from uniformity to gradient distribution. The sintered gradient porous NiTi alloys composes with TiNi, Ti2Ni and TiNi3 phases. After anodic oxidation, Ti oxidation film with the thick of 240nm was formed on the gradient porous NiTi alloy. The corrosion resistance of gradient porous NiTi alloy was obviously improved and the rate of Ni release was significantly reduced.

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