WEAR-RESISTANT ELEMENT FOR A COMMINUTION DEVICE
A wear-resistant element is configured to be mounted on a comminuting device or a silo. The wear-resistant element may be formed from a ceramic that comprises yttrium-stabilized, tetragonal polycrystalline zirconia (TPZ). The TPZ makes up a proportion of the ceramic of at least 60% by volume, in some cases at least 80%, or even 95% to 100%. The ceramic may have a porosity of less than 5%. The ceramic may have a ratio of monoclinic to tetragonal zirconia of 10% to 40%. An yttrium-stabilized zirconia of the ceramic may have a grain size D50 of less than 1.5 μm. The ceramic may have an yttrium content of 2 to 4 mol % Y2O3.
1 .- 8 . (canceled)
9 . A wear-resistant element that is mountable on a comminuting device or a silo, wherein the wear-resistant element is formed completely from a ceramic that comprises yttrium-stabilized, tetragonal polycrystalline zirconia (TPZ), wherein the TPZ makes up at least 60% by volume of the ceramic.
10 . The wear-resistant element of claim 9 wherein the ceramic has a porosity of less than 5%.
11 . The wear-resistant element of claim 9 wherein the ceramic has a porosity of less than 3%.
12 . The wear-resistant element of claim 9 wherein the ceramic has a ratio of monoclinic to tetragonal zirconia of 10% to 40%.
13 . The wear-resistant element of claim 9 wherein the ceramic has a ratio of monoclinic to tetragonal zirconia of 10% to 20%.
14 . The wear-resistant element of claim 9 wherein an yttrium-stabilized zirconia of the ceramic has a grain size D50 of less than 1.5 μm.
15 . The wear-resistant element of claim 9 wherein an yttrium-stabilized zirconia of the ceramic has a grain size D50 of less than 1.0 μm.
16 . The wear-resistant element of claim 9 wherein an yttrium-stabilized zirconia of the ceramic has a grain size D50 of less than 0.8 μm.
17 . The wear-resistant element of claim 9 wherein the ceramic has an yttrium content of 2 to 4 mol % Y2O3.
18 . The wear-resistant element of claim 9 wherein the ceramic has less than 0.1 per mm 2 of pores with a size of more than 200 μm.
19 . A comminuting device comprising:
a wear area; and
a wear-resistant element that is mounted at least partially in a recess in a surface of the wear area, wherein the wear-resistant element is formed completely from a ceramic that comprises yttrium-stabilized, tetragonal polycrystalline zirconia (TPZ), wherein the TPZ makes up at least 60% by volume of the ceramic
20 . The comminuting device of claim 19 wherein the wear-resistant element is bonded substance-to-substance to the wear area.
21 . The comminuting device of claim 19 wherein the wear-resistant element is welded to the wear area.
22 . The comminuting device of claim 19 wherein the wear-resistant element is adhesively bonded to the wear area.
23 . The comminuting device of claim 19 wherein the wear-resistant element is soldered to the wear area.
24 . The comminuting device of claim 19 wherein the ceramic has a porosity of less than 3%.
25 . The comminuting device of claim 19 wherein the ceramic has a ratio of monoclinic to tetragonal zirconia of 10% to 20%.
26 . The comminuting device of claim 19 wherein an yttrium-stabilized zirconia of the ceramic has a grain size D50 of less than 1.5 μm.
27 . The comminuting device of claim 19 wherein the ceramic has an yttrium content of 2 to 4 mol % Y2O3.
28 . The comminuting device of claim 19 wherein the ceramic has less than 0.1 per mm 2 of pores with a size of more than 200 μm.