Armor component

Patent metadata

Field	Value
Publication number	US-10247521-B2
Application number	US-201715666323-A
Country	US
Kind code	B2
Filing date	Aug 1, 2017
Priority date	Jan 14, 2014
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

An armor component including a body having a first portion including calcium boride compounds include non-stoichiometric calcium boride (CaB x ) and stoichiometric calcium boride (CaB 6 ) and having a density of at least about 80% theoretical density. In one aspect, the first portion can include a first phase comprising silicon carbide (SiC) and a second phase comprising calcium boride (CaB 6 ). In another aspect, the first portion can further include a third phase comprising boron carbide (B 4 C).

First claim

What is claimed is:

1. An armor component comprising:
a body including a first portion including:
a first phase comprising silicon carbide (SiC), wherein the first phase has an average grain size (GS1) of not greater than about 6 microns;
a second phase comprising calcium boride (CaB 6 ), wherein the second phase has an average grain size (GS2) of not greater than GS1;
a density of at least about 80% theoretical density; and
wherein the body includes a first content (C1) of the first phase and a second content (C2) of the second phase, and wherein C1≥ C2.

2. The armor component of claim 1 , wherein the body is essentially free of titanium.

3. The armor component of claim 1 , wherein the first portion comprises a bulk density of at least about 2.28 g/cm 3 .

4. The armor component of claim 1 , wherein the body further includes a third phase comprising boron carbide (B4C).

5. The armor component of claim 4 , wherein the body includes a first content (C1) of the first phase, a second content (C2) of the second phase, and a third content (C3) of the third phase, and wherein C3≥C2.

6. The armor component of claim 4 , wherein the body includes a first content (C1) of the first phase, a second content (C2) of the second phase, and a third content (C3) of the third phase, and wherein C3≥C1.

7. The armor component of claim 4 , wherein the body comprises a third content (C3) of the third phase of at least about 4 vol % and not greater than about 50 vol % for a total volume of the first portion.

8. The armor component of claim 1 , wherein the second phase comprises an average particle size (D50) of not greater than about 5 microns.

9. The armor component of claim 1 , wherein the body is essentially free of nitride-containing compounds.

10. The armor component of claim 1 , wherein the body comprises a density of at least about 96.5% theoretical density.

11. An armor component comprising:
a body including:
a first portion including:
a first phase comprising silicon carbide (SiC), wherein the first phase has an average grain size (GS1) of not greater than about 6 microns;
a second phase comprising calcium boride (CaB 6 ), wherein the second phase has an average grain size (GS2) of not greater than GS1;
a third phase comprising boron carbide (B 4 C),
a density of at least about 80% theoretical density; and
wherein the first portion includes a first content (C1) of the first phase, a second content (C2) of the second phase, and a third content (C3) of the third phase, and wherein C3 is at least about 4 wt % and not greater than about 50 wt %.

12. The armor component of claim 11 , wherein the first portion includes a Vickers Hardness measured at 1 kilogram (HV 1kg ) of at least 19 GPa and not greater than 25 GPa.

13. The armor component of claim 11 , wherein the first portion includes a Vickers toughness measured at 1 kilogram by the indention method of at least 5.5 MPa·m 1/2 and not greater than 7.5 MPa·m 1/2 .

14. The armor component of claim 11 , wherein the first portion comprises a strength as measured by the 4-point B-bar method of at least about 80 MPa and not greater than about 125 MPa.

15. The armor component of claim 11 , wherein the first portion includes a first content (C1) of the first phase, a second content (C2) of the second phase, and a third content (C3) of the third phase, and wherein C3≥C2.

16. The armor component of claim 11 , wherein the first portion includes a first content (C1) of the first phase, a second content (C2) of the second phase, and a third content (C3) of the third phase, and wherein C3≥C1.

17. The armor component of claim 11 , wherein the third phase has an average grain size (GS3) of not greater than GS1.

18. The armor component of claim 11 , wherein the second phase comprises an average particle size (D50) of not greater than about 5 microns.

19. The armor component of claim 11 , wherein the body comprises a density of at least about 96.5% theoretical density.

Assignees

• Saint Gobain Ceramics

Inventors

• Bottiglieri Stephen
• Bakshi Abhaya K

Classifications

• C04B2235/6567

  Treatment time · CPC title

• C04B2235/786

  Micrometer sized grains, i.e. from 1 to 100 micron · CPC title

• C04B2235/79

  Non-stoichiometric products, e.g. perovskites (ABO3) with an A/B-ratio other than 1 · CPC title

• C04B2235/785

  Submicron sized grains, i.e. from 0,1 to 1 micron · CPC title

• C04B2235/5445

  submicron sized, i.e. from 0,1 to 1 micron · CPC title