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Best Brake Drum With Low Cost,Lightweight Metal-matrix Composite(MMC)
Apr 12, 2017

A metal matrix composite (MMC), such as a brake drum, includes a preform having ceramic particles and ceramic fibers and defining a plurality of voids. As we known that the metal-matrix composite have been used for brake rotors and brake pads for years,they are typically costly and often require batch processing.While some leading company is attempting combine an MMC brake wear surface inside a low-cost and easy-to-machine cast-aluminum drum brake body,such as Accuride corp.


As a rotating mass cantilevered on the suspension, brakes represent valuable weight on the vehicle,Vehicle manufacturers place a premium value on the reduction of unsprung mass, in many cases, twice the value of mass reduced elsewhere on the vehicle.The military vehicles, weight reduction in structural components translates to greater operational flexibility — the ability to carry more payload, drive more easily over unimproved roads and/or support more protective armor.he MMC brake drum is anticipated to offer longer service life to fleet operators, reduced stopping distance and increased payloads in addition to weight savings.


 Aluminum Silicon alloys physical properties,


Si/Al Alloy

Alloy

CTE,

Density,

Thermal

Bend

Yield

Elastic



designation

composition

ppm/°C,

g/cm3

Conductivity

Strength,

Strength,

Modulus,





25-100°C


at 25°C

MPa

MPa

GPa







W/mK






AlSi27

Al - 27%Si

17

2.6

175

170

130

91



AlSi42

Al- 42%Si

13.5

2.55

160

200

187

105



AlSi50

Al- 50%Si

11.5

2.5

140

220

210

118



AlSi60

Al - 60%Si

10

2.46

125

181

181

121



AlSi70

Al- 70%Si

7.5

2.43

120

138

138

131



Al6061


22.6

2.7

210

312

270

69



Al4047


21.6

2.66

193

208

129

70












  Table1: Standard Silicon Aluminum (Si/Al) Alloys and a selection of their physical properties


Especially in the light of some relevant study, it concluded that AlSi alloy(same as CE alloys) has less weight,less deformation,minimum temperature at the surface.Hence,the silicon aluminum alloys can be better candidate material for the brake drum application of lightweight tactical vehicles. Baienwei is specialized in manufacturing exclusive controlled expansion(AlSi) alloys for years,its AlSi alloys performance is reliability and cost efficiency.


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