ICS

81.060.30

CCS

Q30

中華人民共和國國家標準

GB/T44537—2024

精細陶瓷室溫斷裂韌性試驗方法

表面裂紋彎曲梁（SCF）法

Testmethodforfracturetoughnessoffineceramicsatroomtemperature—

Surfacecrackinflexure（SCF）method

[ISO18756：2003，F(xiàn)ineceramics（advancedceramics,advancedtechnical

ceramics）—Determinationoffracturetoughnessofmonolithicceramicsatroom

temperaturebythesurfacecrackinflexure（SCF）method,MOD]

2024-09-29發(fā)布2025-04-01實施

國家市場監(jiān)督管理總局發(fā)布

國家標準化管理委員會

GB/T44537—2024

目次

前言

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Ⅲ

1

范圍

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1

2

規(guī)范性引用文件

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1

3

術語和定義

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4

符號

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5

原理

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6

儀器設備

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3

6.1

試驗機

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6.2

彎曲夾具

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6.3

外徑測量裝置

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6.4

硬度計

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6.5

顯微鏡

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6.6

染色滲透劑

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6.7

溫度測量裝置

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6.8

濕度測量裝置

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7

樣品

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7.1

樣品尺寸和樣品制備

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7.2

樣品數量

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8

試驗步驟

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6

8.1

預制裂紋

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6

8.2

樣品斷裂試驗

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8.3

裂紋尺寸測量

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8.4

環(huán)境影響

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8.5

評估R曲線行為（可選）

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8.6

參考材料（可選）

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9

結果計算

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10

試驗報告

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12

附錄A（資料性）環(huán)境因素影響的慢速裂紋擴展

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13

附錄B（規(guī)范性）預裂紋的表征

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14

附錄C（資料性）用SCF方法進行R曲線行為評價

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19

附錄D（規(guī)范性）倒角修正

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21

參考文獻

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Ⅰ

GB/T44537—2024

前言

本文件按照GB/T1.1—2020《標準化工作導則第1部分：標準化文件的結構和起草規(guī)則》的規(guī)

定起草。

本文件修改采用ISO18756：2003《精細陶瓷（先進陶瓷、先進技術陶瓷）采用表面裂紋彎曲梁

（SCF）法測定精細陶瓷室溫斷裂韌性》。

本文件與ISO18756：2003的技術差異及原因如下：

—刪除了術語“斷裂韌性值”，以避免術語混淆不清（見ISO18756：2003中的3.3）；

—將SCF法測得的斷裂韌性的符號KIsc更改為KIc,SCF，以方便對斷裂韌性術語的理解（見

第4章）；

—用規(guī)范性引用的GB/T6569替換了ISO14704，以適應我國技術條件，增加可操作性（見6.2、

7.1.2、7.1.3）；

—增加了對試驗報告內容的要求，以增加可操作性，便于本文件的執(zhí)行[見第10章的a）、b）、

c）、s）]。

本文件做了下列編輯性改動：

—為與現(xiàn)有標準協(xié)調，將標準名稱改為《精細陶瓷室溫斷裂韌性試驗方法

表面裂紋彎曲梁

（SCF）法》；

—將關于SCF法和單邊預裂紋梁法的區(qū)別和聯(lián)系的描述更改為注（見第1章，ISO18756：2003中

的第1章）；

—用資料性引用的GB/T23806替換了ISO15732（見第1章）；

—刪除了ISO18756：2003中的第1章的注；

—更改了術語“應力強度因子”的注（見3.1注1，ISO18756：2003中的注）；

—增加了術語“應力強度因子”的注（見3.1注2）；

—刪除了ISO18756：2003中3.3、7.1.2、8.1.3、8.1.8和8.3.4的注；

—增加了條標題（見6.1~6.8、8.1.1~8.1.10）；

—用資料性引用的GB/T1216替換了ISO3611（見6.3）；

—刪除了ISO18756：2003中8.1.1的注2，8.1.7.2的注3和8.4.3的注1、注2。

請注意本文件的某些內容可能涉及專利。本文件的發(fā)布機構不承擔識別專利的責任。

本文件由中國建筑材料聯(lián)合會提出。

本文件由全國工業(yè)陶瓷標準化技術委員會（SAC/TC194）歸口。

本文件起草單位：中國科學院上海硅酸鹽研究所、廣東省科學院新材料研究所、中廣核研究院有限

公司、寧波伏爾肯科技股份有限公司、國裝新材料技術（江蘇）有限公司、濟寧市質量計量檢驗檢測研

究院、山東工業(yè)陶瓷研究設計院有限公司、山東國瓷功能材料股份有限公司、西安鑫垚陶瓷復合材料股

份有限公司、中國國檢測試控股集團股份有限公司、武漢理工大學、新三思（深圳）實驗設備有限公

司、北京中天標科標準化技術研究院集團有限公司、東華大學、上海工程技術大學。

本文件主要起草人：王新剛、王小飛、葉云、薛佳祥、袁祥奕、曹艷芬、王銘、崔爽、劉洋、

吳永慶、熊禮俊、劉潔、蔣丹宇、陳常祝、鄒冀、萬德田、包亦望、胡麗、張海昇、吳利翔、鮑偉超、

呂一航、馬小民、李健、楊國銀、付穎、張國軍、袁建輝、高建華、李蕾。

Ⅲ

GB/T44537—2024

精細陶瓷室溫斷裂韌性試驗方法

表面裂紋彎曲梁（SCF）法

1范圍

本文件描述了采用表面裂紋彎曲梁（SCF）法測定精細陶瓷室溫斷裂韌性的試驗方法。

本文件既適用于具有平坦或上升裂紋擴展阻力曲線的材料，也適用于單相陶瓷、晶須（或）顆粒增

強的復相陶瓷材料。

本文件不適用于連續(xù)纖維增強的陶瓷基復合材料。

注：本文件的表面裂紋彎曲梁（SCF）法與GB/T23806[2]的單邊預裂紋梁法類似，區(qū)別是通過不同方法制備預裂

紋，本方法制備的預裂紋尺寸較小。這兩種方法對于具有平坦R曲線的材料測試結果相近。

2規(guī)范性引用文件

下列文件中的內容通過文中的規(guī)范性引用而構成本文件必不可少的條款。其中，注日期的引用文

件，僅該日期對應的