Page 268 - Engineering Plastics Handbook

230 Engineering Plastics

thermal resistance, resistance to aircraft fluids, creep and fatigue resist-
ance, and low wear are required.
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Aurum JCN3030 has been chosen by Ishikawajima-Harima Heavy
Industries Co., Ltd. (IHI), a major jet engine manufacturer, for the outer
platform of the V-2500 jet engine. The outer platform supports the outer
vane, which rectifies the airstream coming from the engine. The outer plat-
form has to be corrosion-resistant and have high impact strength since jet
engines often inhale birds while cruising and ingest sand or gravel during
takeoff and landing. The conventional material, a forged aluminum alloy,
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was replaced by Aurum since it reduced jet engine mass and led to fuel
efficiency improvement [2].

Properties

General-purpose and application-specific
properties
High-temperature capability (short-term). The short-term heat resistance
of resins depends upon the glass transition temperature T . The T of
g
g
®
Aurum , 482°F (250°C), exceeds the T of conventional engineering
g
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plastics. Therefore, Aurum can be applied to many kinds of heavy-duty
or precision machine parts demanding excellent mechanical properties
at high temperatures and under high loads. Fig.10.7 shows the change
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of tensile strength of Aurum up to high temperature.
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High-temperature capability (long-term). One of the features of Aurum is
excellent long-term heat capability at elevated temperatures. Long-term
heat resistance is usually represented by the retention of properties after
the specimens are exposed to high temperatures. Table 10.3 shows the
100

80
Tensile strength, MPa 60

40

20

0
0 100 (212) 200 (392)
Temperature, °C (°F)
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Figure.10.7 Aurum PL450C (no filler), tensile
strength versus temperature.