Nanoscaled ceramic powders produced by laser ablation

Xiang, Yang; Riehemann, W.; Dubiel, M.; Hofmeister, H.

doi:10.1016/s0921-5107(02)00291-x

Cited by 39 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main regions in the 750-950 cm -1 range are ascribed to ZrO 2 stretching modes as shown in the Fig. 8.1, owing to the fact that it is similar to infrared (IR) peak of the 20 mol% Al 2 O 3 doped ZrO2 nanoparticles reported previously [273] and the IR peak of the Al 2 O 3 -ZrO 2 nanopowders after laser ablation [274]. The vibration around 3300 to 3500 cm -1 in the FTIR spectra (see Fig.…”

Section: Spectral Analysis and Hydroxyl Groupsupporting

confidence: 74%

See 1 more Smart Citation

CO2 laser surface treatment of magnesia partially stabilised zirconia (MgO-PSZ) for improved biocompatibility

Liang¹

View full text Add to dashboard Cite

Magnesia partially stabilised zirconia (MgO-PSZ) is a bioinert material that exhibits high mechanical strength, excellent corrosion resistance and good compatibility with the physiological environment. It is, therefore, frequently used in high-load bearing sites such as artificial knee and bone screws in orthopaedic applications and jaw and crown in dental applications. Yet, bioinert ceramics have often failed clinically due to a lack of direct bonding with bone, that is, insufficient biointegration. Bioactivity and biointegration are the two essential aspects of good biocompatibility. Bioactivity is usually attributed to the ability to induce an apatite layer on a material's surface in physiological conditions, whilst biointegration (often osseointegration) is the ability to promote anchorage, attachment, spreading, growth and differentiation of bone cells. These interactions occur at the interface between the implant and tissue and are controlled by the surface properties of the biomaterial. At present, the processes available to engineers for the modification of biomaterials in order to enhance biocompatibility are invariably complex and consequently somewhat difficult to control. Lasers, on the other hand, can offer not only a clean and innocuous processing technique, but one that is rapid, flexible and highly controllable. However, no work has been conducted hitherto on laser surface processing to transform the surface properties of bioinert ceramics so as to improve the biocompatibility of implants. This current research was carried out to explore the potential of laser treatment for changing the surface properties and thereof, improving the biocompatibility of the MgO-PSZ surface. The experiments were performed with a 3 kW continuous wave (CW) CO 2 laser and the general effects thereof on the surface of the MgO-PSZ were observed. Variations in the CO 2 laser operating parameters were seen to have a significant effect on the microstructure obtained within the laser treated areas on the MgO-PSZ. Moreover, it was seen that the obtained solidification microstructures on the surface of the MgO-PSZ differed not only with changes in laser parameters, but even across the same track. This was explained by the theories of constitutional supercooling and stability morphology. Contact angle, θ, measurements revealed that CO 2 laser surface treatment of the MgO-PSZ brought about a reduction in θ, indicating that the wettability characteristics of the MgO-PSZ had been enhanced. It was subsequently deduced that the factors active in causing the observed modification in the wettability characteristics of the MgO-PSZ were the surface roughness, surface oxygen content and surface energy. By employing a novel technique the predominant mechanisms active in the wettability modification and effects of the microstructure features on the wettability characteristics was identified.

show abstract

Section: Spectral Analysis and Hydroxyl Groupsupporting

confidence: 74%

“…8.2) could be attributed to the OH groups. Indeed OH stretching vibrations around this region have been observed by other workers on Al 2 O 3 -ZrO 2 nanopowders after Nd:YAG laser ablation [274] and on the Fe-doped crystals after laser irradiations [275]. As one can see from Fig.…”

Section: Spectral Analysis and Hydroxyl Groupsupporting

confidence: 66%

CO2 laser surface treatment of magnesia partially stabilised zirconia (MgO-PSZ) for improved biocompatibility

Liang¹

View full text Add to dashboard Cite

show abstract

“…High peak power lasers, such as CO 2 , Nd:YAG, and femto second lasers [5][6][7], were adopted to ablate various metallic targets in inert gases or vacuum. If the laser ablation was performed in active gases, ceramics, such as oxide, carbide, nitrite and etc, could be produced [8]. Alternatively, a novel approach of laser ablation in liquids has been proposed to produce nano-particles [9,10].…”

Section: Introductionmentioning

confidence: 99%

An investigation of the synthesis of metallic nano-particles by laser ablation

Jang

Lin

2008

Surface and Coatings Technology

View full text Add to dashboard Cite

“…Many methods can be used to prepare nanosized SiC powders, such as laser induction, plasma assistance, high energy ball milling, sol-gel, carbothermic reduction and chemical vapor deposition (CVD) etc. [5][6][7][8][9][10]. In this study, nanosized SiC powders were prepared by CVD using liquid carbosilanes as the precursor, and the deposited products were characterized.…”

Section: Introductionmentioning

confidence: 99%

Preparation of nanosized silicon carbide powders by chemical vapor deposition at low temperatures

Zhang

et al. 2007

Front. Mater. Sci. China

View full text Add to dashboard Cite

Liquid carbosilane was synthesized and analyzed by infrared (IR) and H-NMR (nuclear magnetic resonance) spectroscopy. Silicon carbide (SiC) powders were prepared by chemical vapor deposition (CVD) at 850°C and 900°C from liquid carbosilanes. The product powders were characterized by IR spectroscopy, X-ray diffractometry (XRD) and scanning electron microscopy (SEM). Results show that liquid carbosilane synthesized was the mixture of several oligomers that had a Si−C backbone. The powders prepared at 850°C contain some organic segments, and those prepared at 900°C are pure nanosized SiC powders, which are partly crystallized, the size of which is about 50-70 nm.

show abstract

Nanoscaled ceramic powders produced by laser ablation

Cited by 39 publications

References 28 publications

CO2 laser surface treatment of magnesia partially stabilised zirconia (MgO-PSZ) for improved biocompatibility

CO2 laser surface treatment of magnesia partially stabilised zirconia (MgO-PSZ) for improved biocompatibility

An investigation of the synthesis of metallic nano-particles by laser ablation

Preparation of nanosized silicon carbide powders by chemical vapor deposition at low temperatures

Contact Info

Product

Resources

About