Lo-Ex

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Lo-Ex is an aluminium alloy with a very small thermal expansion co-efficient. It contains approximately 14 per cent silicon, 2 per cent nickel, and 1 per cent each of copper and magnesium. [1]

Applications

It has been used extensively and successfully over the years for all types of piston, [2] including in Hillman Imp, [3] and Terraplane [4] engines.

LM13 is a related alloy in the Lo-Ex series, also widely used for diesel engine pistons. [5] This alloy contains 12% silicon, 1% copper and 1% magnesium. [5] Both of these alloys have also been used in a strengthened form, reinforced by an MMC or hybrid composite of alumina or zirconium ceramic fibres. These alloys have been worked by squeeze casting or stir casting. [5]

References

  1. ↑ Internal combustion engines illustrated. Long Acre, London: Odhams Press Limited. 1947. p. 85.
  2. ↑ R. Munro (1978). "Wellworthy get it under control" . Industrial Lubrication and Tribology. 30 (6): 224–235. doi:10.1108/eb053170.
  3. ↑ "The Imp Engine".
  4. ↑ "1936 Terraplane specifications" (PDF).
  5. 1 2 3 Smallman, R.E.; Bishop, Ray J. (1999). Modern Physical Metallurgy and Materials Engineering. Butterworth-Heinemann. p. 370. ISBN   9780750645645.
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