8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)

March 9, 2011

(Exact name of registrant as specified in its charter)

Delaware	000-13059	33-0055414
(State or other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

3169 Red Hill Avenue, Costa Mesa, CA	92626
(Address of Principal Executive Offices)	(Zip Code)

Registrant's telephone number, including area code:  (714) 549-0421

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Exhibit Index on page 4

Item 7.01  Regulation FD Disclosure.

On March 9, 2011, Ceradyne, Inc. issued a press release announcing it was raising its 2011 guidance. A copy of this press release is being furnished as Exhibit 99.1 to this Current Report on Form 8-K.

On March 10, 2011, Ceradyne, Inc. issued a press release announcing that it had acquired a minority interest in Japanese-based Yamanaka EP Corporation. A copy of this press release is being furnished as Exhibit 99.2 to this Current Report on Form 8-K.

In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibit 99.1 and Exhibit 99.2, shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933.

Item 9.01 Financial Statements and Exhibits.

(d)	Exhibits.
	Exhibit Number	Description
	99.1	Press release of Ceradyne, Inc. dated March 9, 2011.
	99.2	Press release of Ceradyne, Inc. dated March 10, 2011.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	CERADYNE, INC.
March 14, 2011	By:	/s/ Jerrold J. Pellizzon
		Jerrold J. Pellizzon
		Chief Financial Officer and Secretary

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EXHIBIT INDEX

Exhibit Number	Description
99.1	Press release of Ceradyne, Inc. dated March 9, 2011.
99.2	Press release of Ceradyne, Inc. dated March 10, 2011.

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EX-99.1

Exhibit 99.1

Jerrold J. Pellizzon	Phil Bourdillon/Gene Heller
Chief Financial Officer	Silverman Heller Associates
(714) 549-0421	(310) 208-2550

CERADYNE, INC. RAISES 2011 GUIDANCE

Costa Mesa, Calif. — March 9, 2011 — Ceradyne, Inc. (Nasdaq: CRDN) raises its 2011 guidance.

Ceradyne, Inc. management is adjusting its 2011 guidance to a range of $2.35 per fully diluted share to approximately $2.70 per fully diluted share, and sales from $505 million to $560 million.

This guidance is increased from prior guidance of $1.50 per fully diluted share to approximately $1.90 per fully diluted share, and sales from $470 million to $540 million on January 10, 2011 and reiterated on February 24, 2011.

Joel P. Moskowitz, Ceradyne, Inc. Chairman, CEO and President, commented: "We are comfortable in revising our 2011 guidance based on several factors. First, we are experiencing increasing gross margins. We believe this is due to higher volume efficiencies, an improved sales mix, as well as firmer pricing in our industrial and commercial markets. Secondly, the recent $56.6 million ESAPI award and several potential additional armor opportunities increase the probability of a substantial increase in military business compared to 2010. We are also encouraged by the preliminary ballistic results the military is achieving on our Enhanced Combat Helmet (ECH) first article testing. Finally, the projected increased industrial ceramic business in Europe and strong demand for our high purity fused silica ceramic solar crucible lead us to project continuing positive results throughout 2011.”

About Ceradyne, Inc.

Ceradyne develops, manufactures, and markets advanced technical ceramic products and components for defense, industrial, energy, automotive/diesel, and commercial applications. In many high performance applications, products made of advanced technical ceramics meet specifications that similar products made of metals, plastics or traditional ceramics cannot achieve. Advanced technical ceramics can withstand extremely high temperatures, combine hardness with light weight, are highly resistant to corrosion and wear, and often have excellent electrical capabilities, special electronic properties and low friction characteristics. Additional information about the Company can be found at http://www.ceradyne.com.

Forward-Looking Statements

Except for the historical information contained herein, this press release contains forward-looking statements regarding future events and the future performance of Ceradyne that involve risks and uncertainties that could cause actual results to differ materially from those projected. Words such as “anticipates,” “believes,” “plans,” “expects,” “intends,” “future,” and similar expressions are intended to identify forward-looking statements. These risks and uncertainties are described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2010 and its Quarterly Reports on Form 10-Q as filed with the U.S. Securities and Exchange Commission.

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EX-99.2

Exhibit 99.2

Michael Kraft	Phil Bourdillon/Gene Heller
Vice President, Nuclear & Semiconductor Business Units	Silverman Heller Associates
(714) 549-0421, x8236	(310) 208-2550

CERADYNE, INC. ACQUIRES INTEREST IN JAPANESE-BASED YAMANAKA EP CORPORATION

Costa Mesa, Calif.; Kyoto, Japan – March 10, 2011 – Ceradyne, Inc. (Nasdaq: CRDN) and Yamanaka EP Corporation (Kyoto, Japan) jointly announced that Ceradyne, Inc. has acquired a minority interest in Yamanaka EP Corporation for an undisclosed amount. Yamanaka EP Corporation, a privately owned company based in Kyoto, Japan, processes advanced technical materials in its modern processing facility in Shiga, Japan, and markets these materials in Japan, Asia, the United States, and Europe primarily for nuclear power plant, solar, optical fiber, and semiconductor applications. Ceradyne, Inc.’s wholly owned subsidiary, Ceradyne Boron Products, supplies nuclear power plant and semiconductor materials to Yamanaka. The companies plan to change the name of Yamanaka EP Corporation to Yamanaka Ceradyne, Inc. There will be a Ceradyne, Inc. representative on the Yamanaka Ceradyne, Inc. Board of Directors.

Mr. Takao Danno, President of Yamanaka commented: “We are very pleased to have our long-term supplier, Ceradyne Boron Products, as an integral part of the Yamanaka family. We anticipate continued growth in the Japanese and other Asian nuclear power plant markets over the next decade.”

Mr. Michael Kraft, Vice President of Ceradyne Nuclear and Semiconductor Business Units, stated: “Our strategy in Asia is to have a regional ‘on the ground’ presence. We have achieved this in China and now our formal partnership with Yamanaka EP Corporation ensures a close professional presence in Japan and the rest of Asia. Yamanaka EP Corporation has been working with Ceradyne’s Boron Products subsidiary and its predecessor in Quapaw, Oklahoma, for over 15 years, and we are looking forward to expanding this relationship into other Ceradyne products.”

About Ceradyne, Inc.

Ceradyne develops, manufactures, and markets advanced technical ceramic products and components for defense, industrial, energy, automotive/diesel, and commercial applications. In many high performance applications, products made of advanced technical ceramics meet specifications that similar products made of metals, plastics or traditional ceramics cannot achieve. Advanced technical ceramics can withstand extremely high temperatures, combine hardness with light weight, are highly resistant to corrosion and wear, and often have excellent electrical capabilities, special electronic properties and low friction characteristics. Additional information about the Company can be found at http://www.ceradyne.com.

Forward-Looking Statements

Except for the historical information contained herein, this press release contains forward-looking statements regarding future events and the future performance of Ceradyne that involve risks and uncertainties that could cause actual results to differ materially from those projected. Words such as “anticipates,” “believes,” “plans,” “expects,” “intends,” “future,” and similar expressions are intended to identify forward-looking statements. These risks and uncertainties are described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2010 and its Quarterly Reports on Form 10-Q as filed with the U.S. Securities and Exchange Commission.

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