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EDITORIAL iTSSe TSS
A D V A N C E D M A T E R I A L S & P R O C E S S E S | M A Y 2 0 1 5
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REVIEW RTICLE
distributions, and grain sizes are likely
to form. However, the future will de-
mand such features to be dominant
and manufactured in a controlled fash-
ion rather than being just a curious and
scientifically interesting anomaly. The
most appropriate feedstock is consoli-
dated from nanoparticulates produced
via a chemical route. Thermal spray re-
quires artistic adjustment of spray pa-
rameters so only partial melting occurs
to maintain consolidated nanostruc-
tures into an integral coating by partial-
ly melted particles[75,79,103].
Suspension thermal spray and
solution precursor plasma spray meth-
ods show considerable promise in low-
ering the feedstock cost barrier and
achieving nanostructured deposits.
However, challenges exist with regard
to attaining high deposition efficiencies
and high rates of deposition[104,105,339] ,
characteristics that are both vital for
manufacturing environments. Specific
applications such as thermal barrier
coatings or electronic devices are spec-
ulated to be the primary drivers to grow
these methods.
Themain challenge with regard to
feedstock is to attain nanostructured
deposits. It is suggested that duel injec-
tion port strategies and use of a single
injection port, along with slurry feed-
stock consisting of traditional solid and
low-viscosity mixtures, will pave the
way for increased production.
Further needs include the ability
to scale up feedstock production and
ensure long-term storage capability,
especially if any fluid components are
present, and safeguarding and controls
with respect to occupational health
and safety. iTSSe
For more information: Christopher
Berndt is professor, Industrial Research
Institute Swinburne, SwinburneUniver-
sity of Technology, John St., Hawthorn
VIC 3122, Australia, +613.9214.8706,
,
.
Dedication
Theauthorsdedicate this reviewto
the memory of Prof. Joachim ‘‘Jockel’’
V.R. Heberlein—8/19/1939-1/17/2014.
Jockel made significant contributions
in the topical area of nanomaterials that
were manufactured via thermal plasma
techniques. ‘‘His lively spirit, intense
interest, and amazing energy all left
him…I wonder where they went.’’
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