Plastic component comprising a carbon filler
A composite material containing carbon and a plastic includes: a) provision of a pulverulent composition with one or more components of amorphous carbon, graphite and mixed forms thereof, b) provision of a liquid binder, c) planar deposition of a layer consisting of the material provided in step a) and local deposition of droplets of material provided in step b) onto this layer and any number of repetitions of step c), the local deposition of the droplets in the successive repetitions of this step being adapted according to the desired shape of the component to be produced, d) at least partial curing or drying of the binder to obtain a green body that has the desired shape of the component, e) impregnation of the green body with a liquid synthetic resin and f) curing of the synthetic resin to produce a synthetic resin matrix.
1. A method for producing a three-dimensional component consisting of a composite material containing carbon and plastics material, which method comprises the following steps:
a) providing a powdered composition comprising one or more constituents selected from the group consisting of amorphous carbon, graphite and hybrid forms thereof,
b) providing a liquid binder,
c) planarly depositing a layer of the powdered composition provided in a) and locally depositing droplets of the liquid binder provided in b) on said layer, and repeating step c) any number of times, wherein the step of locally depositing the droplets in subsequent repetitions of said step is adjusted according to the desired shape of the three-dimensional component to be produced,
d) at least partially hardening or drying the liquid binder and obtaining a green body that has the desired shape of the three-dimensional component,
e) impregnating the green body with a liquid synthetic resin, and
f) hardening the liquid synthetic resin so as to form a synthetic resin matrix.
2. The method according to claim 1 , wherein step d) comprises carbonising the green body at a temperature of between 500° C. and 1300° C.
3. The method according to claim 1 , wherein the green body is subject to a recompaction process on one or multiple occasions between steps d) and e), which process comprises the following steps:
d1) impregnating the green body with a carbon source,
d2) carbonising the green body at a temperature of between 500° C. and 1300° C.
4. The method according to claim 1 , wherein the powdered composition comprises acetylene coke, flexicoke, fluid coke, shot coke, hard coal tar pitch coke, petroleum coke, carbon black coke, anthracite, synthetic graphite, spheroidal graphite, microcrystalline natural graphite, carbonised ion-exchange resin beads or a coke granulate.
5. The method according to claim 1 , wherein the powdered composition comprises graphite particles or graphitised coke particles, and step d) comprises carbonising the green body at a temperature of between 500° C. and 1300° C.
6. The method according to claim 1 , wherein the powdered composition comprises particles in a particle size range of a d50 value, on average, a shape factor (width/length) of at least 0.5.
7. The method according to claim 1 , wherein the liquid binder in step b) comprises phenolic resin, furan resin or liquid glass.
8. The method according to claim 1 , wherein the liquid synthetic resin is selected such that the component has a porosity of at most 2%.
9. The method according to claim 1 , wherein the liquid binder in step b) and the liquid synthetic resin in step e) belong to the same class of resins.
10. The three-dimensional component which consists of a composite material containing carbon and plastics material and is produced using a method according to claim 1 .