According to Boeing’s Monthly Order Report, it
didn’t have any new order in April after the accident of ET302 on March 10. And the report also showed the delivery volume
in April was only 23, which was a 135% decrease from the previous month and a
91% decrease from the same period of last year.
At the same time, many media and airlines in
the world pay their attention to the Chinese C919, a plane at the same level as
the Boeing 737 series and the Airbus A320 series.
Though it is difficult to break in short time
the situation that Boeing and Airbus controls the whole civil aviation market, it
is still a good news for COMAC, the manufacturer of C919, to win more orders
and attentions from foreign companies.
In the future, the development of C919 will definitely
drive related industries of aviation in China, for example composite materials,
aerospace alloys and organic polymer materials etc,.
According to Mr. Cao Chunxiao, materials
scientist of China Academy of Sciences, the following five materials are of
great importance in the field of aviation:
alloy is an important structural material for the aircraft. It has high
temperature resistance, low density, high strength, and corrosion resistance,
so it is mainly used for those important load-bearing components such as
aero-engine blades and discs, engine pylons, aircraft landing gear, fuselage
frame, wing beam, tail joint, etc.
The amount of
this material used in C919 is about 8%, which is equivalent to the amount of it
used in Boeing 777 and Airbus A380.
use of composite materials in the aerospace industry has continued to increase
since the 1970s. It not only has higher strength and specific stiffness, but
also facilitates overall structure, therefore, it can significantly reduce the
weight of the aircraft and correspondingly reduce the fuel consumption.
amount of high-performance composite material accounted for 25% on the Airbus
A380, and 12% on C919.
exactly developed to meet the demanding requirements of modern aerospace
aero engines, superalloy account for 40% to 60% of the total engine. It is
mainly used for combustion chambers, guide vanes, turbine blades and turbine
discs in the engine. In addition, this material is also used for components
such as casings, rings, afterburners and tail nozzles.
alloy has low density but high strength, close to or exceeding high-quality
steel, and has good plasticity, so it can be processed into various profiles, and
has excellent electrical conductivity, thermal conductivity and corrosion
All kinds of
aircrafts use aluminum alloy as the main structural material. It can be used to
make the surface, beams, ribs, stringers, bulkheads and landing gear on the
Steel is one
of the most used materials in the world for its low price and reliable
performance. The landing gears of the Boeing 737-300 and later series aircraft
have basically selected the 300M steel.
components such as the landing gear and piston rod of the C919 are also made of
Science and technology of materials are closely
related with the development of aerospace industry. Along with the increasing popularity
of C919, China’s material market will also meet new opportunities.