Effect of CNTs on Property of Calcium Phosphate Cement

2007 ◽  
Vol 336-338 ◽  
pp. 1606-1608 ◽  
Author(s):  
Ping Zhao ◽  
Kang Ning Sun ◽  
Tai Rong Zhao ◽  
Xue Hua Ren
Keyword(s):  
Mechanical Property ◽  
Carbon Nanotubes ◽  
Calcium Phosphate ◽  
Ball Milling ◽  
Calcium Phosphate Cement ◽  
Bending Strength ◽  
Cement Composite ◽  
Composite Powders ◽  
The Core ◽  
Hydroxyapatite Crystals

The effect of carbon nanotubes (CNTs) on bending strength of calcium phosphate cement was investigated. The cement composite powders, containing 0, 0.2%, 0.4%, 0.6%, 0.8% and 1.0wt% CNTs respectively, were prepared by ball milling. It was found that the presence of CNTs improved the bending strength of the cement from 6.6 MPa to the best 10.5 MPa. The reason for mechanical property improvement is related to the fibers (bars)-like microstructure of the reinforcing element, with CNT in the core and hydroxyapatite crystals growing on it.

Non-decay type fast-setting calcium phosphate cement: composite with sodium alginate

Biomaterials ◽  
1995 ◽  
Vol 16 (7) ◽  
pp. 527-532 ◽  
Author(s):  
Kunio Ishikawa ◽  
Youji Miyamoto ◽  
Masayuki Kon ◽  
Masaru Nagayama ◽  
Kenzo Asaoka
Keyword(s):  
Calcium Phosphate ◽  
Sodium Alginate ◽  
Calcium Phosphate Cement ◽  
Cement Composite

Vertebroplasty in Goat Model Using Macroporous Calcium Phosphate Cement (MCPC®)

2007 ◽  
Vol 361-363 ◽  
pp. 377-380
Author(s):  
Xavier Bourges ◽  
Serge Baroth ◽  
Eric Goyenvalle ◽  
Ronan Cognet ◽  
Françoise Moreau ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Calcium Phosphate ◽  
Compression Test ◽  
Invasive Surgery ◽  
Calcium Phosphate Cement ◽  
Bone Ingrowth ◽  
Cement Matrix

We performed vertebroplasty on goat model by injecting a new macroporous calcium phosphate cement MCPC®. The mechanical property of the cement is about 12MPa after 24 hours (compression test). The cement matrix is totally transformed into poorly crystallized apatite in 48 hours. This study demonstrates that MCPC cement was suitable and efficient for a spine application. Its injectability allows to be used in mini invasive surgery and its mechanical properties are compatible to support spine strength. In addition, a bone ingrowth onto the BCP granules occurred with time.

Study on Hydroxyapatite Fibers with Strontium Reinforced Calcium Phosphate Cement

2013 ◽  
Vol 788 ◽  
pp. 119-126 ◽  
Author(s):  
Bin Chu ◽  
Jian Xiong ◽  
Ming Bo Wang ◽  
Xiao Li Li ◽  
Zhen Ding She
Keyword(s):  
Mechanical Property ◽  
Calcium Phosphate ◽  
Calcium Phosphate Cement ◽  
Solidification Time ◽  
Cytotoxicity Test ◽  
Dicalcium Phosphate Dihydrate ◽  
Phosphate Dihydrate ◽  
Main Components ◽  
Sem Morphology

The solidification time of injectable bone cement should be fit for the clinical application. This research find out the effect of the amount of water-absorbent agent and water-retaining agent. The optimal ratio was be determined. The hydroxyapatite fibers with strontium were added into the CPC. The mechanical property, cytotoxicity test, SEM morphology, XRD and degradation performance in vitro were characterized, respectively. The results show the CPC had the solidification time of 12min when the ratio as below: β-TCP 55.5%, Ca (H2PO4)2H2O(MCPM)36%, MgHPO43H2O 5%, MgSO41%, Sodium pyrophosphate2.5%. The main components of solidify CPC were hydroxyapatite (HA) and dicalcium phosphate dihydrate (DCPD). The materials had a good Anti-collapsing performance and the degradation rate up to 16.72% after 9 weeks. The mechanical property of composite materials which combined with hydroxyapatite fibers with strontium has been improved, and the cell proliferation rate is also higher than common CPC. This study shows a potentially effective method to improve the mechanical property and the biological activity of calcium phosphate cement.

In Situ Synthesis of CNTs/Mg Composite Powders by CVD at Low Temperatures

2012 ◽  
Vol 588-589 ◽  
pp. 1681-1684
Author(s):  
Fu Jun Sun ◽  
Chun Sheng Shi ◽  
En Zuo Liu ◽  
Chun Nian He ◽  
Nai Qin Zhao
Keyword(s):  
Mechanical Property ◽  
Carbon Nanotubes ◽  
Vapor Deposition ◽  
Low Temperatures ◽  
Chemical Vapor ◽  
In Situ Synthesis ◽  
Composite Powders ◽  
Co Catalyst ◽  
Synthesis Of Carbon Nanotubes

The emphasis of this study was in-situ synthesis of carbon nanotubes (CNTs) on Mg matrix at 480°C. The process involves homogeneous deposition of Co catalyst onto Mg by deposition-precipitation route with low Co content (1.0 wt.%) and in situ synthesis of CNTs by chemical vapor deposition. The morphologies and microstructure of the as-obtained CNTs/Mg composite powders was characterized by SEM, TEM, Raman spectrum, and XRD. The results indicated that CNTs were well graphitized and uniformly distributed on the surface of Mg powders, which would be beneficial to the mechanical property of CNTs/Mg composites.

The Microstructure, Mechanical and Dielectric Properties of CNTs/Mullite Ceramics Composites

2006 ◽  
Vol 313 ◽  
pp. 145-150 ◽  
Author(s):  
Jing Wang ◽  
Hua Min Kou ◽  
Yu Bai Pan ◽  
Jing Kun Guo
Keyword(s):  
Carbon Nanotubes ◽  
Fracture Toughness ◽  
Carbon Nanotube ◽  
Bending Strength ◽  
Composite Powders ◽  
The Matrix ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Mullite Ceramics ◽  
Dissipative Factor

Carbon nanotube-mullite (Al2O3/SiO2=3/2) composites have been prepared by hot-pressing the corresponding composite powders, in which the multi-walled carbon nanotubes(1~10 vol%) are homogeneously dispersed between the mullite grains. The microstructure of the specimens has been studied and discussed in relation to the properties of the matrix, the bending strength and the fracture toughness, the dielectric constant and the dissipative factor. Carbon nanotube-mullite composites are potential electromagnetic wave absorbers owing to the percolation of the carbon nanotubes.

Reinforcing of a Calcium Phosphate Cement with Hydroxyapatite Crystals of Various Morphologies

2010 ◽  
Vol 2 (11) ◽  
pp. 3276-3284 ◽  
Author(s):  
Inés S. Neira ◽  
Yury V. Kolen’ko ◽  
Krishna P. Kommareddy ◽  
Inderchand Manjubala ◽  
Masahiro Yoshimura ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Calcium Phosphate Cement ◽  
Hydroxyapatite Crystals

Effect of the Ball Milling on the Microstructure and Mechanical Properties of AlN/Cu Composite

2015 ◽  
Vol 816 ◽  
pp. 15-20
Author(s):  
Qian Yu ◽  
Mei Hui Song ◽  
Yan Li ◽  
Xiao Chen Zhang
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Ball Milling ◽  
Bending Strength ◽  
Rotation Speed ◽  
Mixing Time ◽  
Composite Powders

AlN/Cu composite powder was prepared by ball milling method. Laser particle size analyzer, X-ray diffraction and scanning electron microscopy analysis were performed to study AlN/Cu composite powders. The effects of rotation speed, mixing time, and ball to powder weight ratio (BPR) on the particle size distribution, composition, and morphology were investigated. Results showed that the best ball milling parameters were the rotation speed of 200r/min, mixing time of 6 hours and BPR 10:1. In this best condition, AlN/Cu composite powders would be obtained with optimum particle size distribution and morphology. Then composite powders were pressed at 500MPa and sintered at 1000°C in N2atmosphere. Finally, the composite with an AlN content of 33wt% showed the bending strength of 370MPa, Vikers hardness HV154, thermal conductivity of 182.7W/m°C and electrical conductivity of 3.08MS/m. However, the composite with an AlN content of 25wt% showed the bending strength of 329MPa, Vikers hardness HV122, thermal conductivity of 195W/m°C and electrical conductivity of 6.54MS/m.

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