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Note:
Biotechnology Congress 2018 & Emerging Materials 2018
Biomedical Research
|
ISSN: 0976-1683
|
Volume 29
S e p t e m b e r 0 6 - 0 7 , 2 0 1 8 | B a n g k o k , T h a i l a n d
allied
academies
Joint Event on
EMERGING MATERIALS AND NANOTECHNOLOGY
BIOTECHNOLOGY
&
Annual Congress on
Global Congress on
Biomed Res 2018, Volume 29 | DOI: 10.4066/biomedicalresearch-C4-011
NEXT GENERATION THERMAL
BARRIER COATINGS FOR
AEROENGINE APPLICATIONS;
BOND COAT MATERIALS
A D Chandio
NED University of Engineering and Technology, Pakistan
B
ond coats (BCs) based on βNiAl matrix are commonly
employed in thermal barrier coating systems (TBC) for
aero-engine applications. The addition of reactive elements
(REs) such as; Zr, Hf and Y in βNiAl are being researched
extensively since they offer improved oxidation performance
at high temperatures. In this study, experimental findings
will be presented on the βNiAl matrix-based BCs that were
prepared onto CMSX-4 superalloy with and without additions
of Zr and Hf using an
in-situ
chemical vapor deposition (CVD)
method. The BCs were isothermally oxidized at 1150
o
C for 100
hours in laboratory air. The processing of REs-βNiAl and their
effects on oxidation were studied in comparison to undoped
βNiAl. This was followed by characterization techniques
including TEM, FIB, ASTAR analysis; SEM, XRD, Proto iXRD
and Raman spectroscopy/PLPS. The REs doped βNiAl were
successfully prepared using
in-situ
CVD technique. BC
performance is discussed in detail such as thermally grown
oxide (TGO) phases, stresses, morphologies etc. In general,
TGO formed due to oxidation of REs doped samples consisted
of alpha alumina alone; on contrary mixture of TiO
2
, NiAl
2
O
4
,
θ-Al
2
O
3
and α-Al
2
O
3
was seen in their undoped counterparts.
In addition, the TGO growth rate and residual stresses on REs-
βNiAl were found to be lower than that of the undoped βNiAl.
In addition, oxide pegging (OP) due to REs were also analyzed
using TEM with the aid of FIB this was followed by ASTAR
indexing. The OP was emerged to be one of key features of
REs doped BCs which is crtical factor for lifespan of the TBC.
ENGINEERING AT THE
NANOSCALE: A STRATEGY FOR
DEVELOPING HIGH PERFORMANCE
FUNCTIONAL ECO-FRIENDLY
POLYMER NANOCOMPOSITES
Sabu Thomas and Hanna J Maria
Mahatma Gandhi University, India
T
his talk will concentrate on various approaches being
used to engineer materials at the nanoscale for various
applications in future technologies. The case of clay, carbon
nanostructures (e.g., nanotubes, graphene), metal oxides,
bionanomaterials (cellulose, starch and chitin) will be used to
highlight the challenges and progress. Several bio-degrdable
polymer systems will be considered such as rubbers,
thermoplastics, thermoetts and their blends for the fabrication
of functional polymer nanocomposites. The interfacial activity
of nanomaterials in compatibilising binary polymer blends
will also be discussed. Various self-assembled architectures
of hybrid nanostructures can be made using relatively
simple processes. Some of these structures offer excellent
opportunity to probe novel nanoscale behavior and can impart
unusual macroscopic end properties. The author will talk
about various applications of these materials, considering
their multifunctional properties. Some of the promising
applications of clay, metal oxides, nano cellulose, chitin,
carbon nanomaterials and their hybrids will be reviewed.